JP2021183818A - Submerged electric pump system and submerged electric pump - Google Patents

Abstract

To provide a submerged electric pump system which suppresses a malfunction of an element for detecting a water level, and can efficiently operate a remaining submerged electric pump even if a malfunction occurs in one set of the submerged electric pumps.SOLUTION: A submerged electric pump system 100 comprises submerged electric pumps 3a and 3b. Then, when radio communication between a plurality of communication units 33 becomes impossible during alternate operations, a control unit 32 of the submerged electric pump 3a operates the submerged electric pump 3a following an order of the alternate operations, and when the radio communication between the plurality of communication units 33 is not restarted after the lapse of a prescribed period, the control unit determines that a malfunction occurs in the submerged electric pump 3b.SELECTED DRAWING: Figure 1

Description

The present invention relates to a submersible electric pump system and a 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 an electrode exposed to the outside of the submersible pump. Further, each control controller of the two submersible pumps controls to operate alternately by the two submersible pumps by alternately performing operation and suspension based on the water level detected by the water level sensor. It is configured. Further, the control controllers of the two submersible pumps are configured to control the operation of the submersible pumps independently of each other.

Japanese Unexamined Patent Publication No. 2012-215176

However, in the submersible pump system of Patent Document 1, the water level sensor is composed of a capacitance type water level sensor having an electrode exposed to the outside of the submersible pump. Therefore, the electrode of the water level sensor is easily corroded and dirt is easily attached to the electrode, so that there is an inconvenience that the water level sensor is likely to break down. Further, in the submersible pump system of Patent Document 1, the control controllers of the two submersible pumps are configured to control the operation of the submersible pumps independently of each other. Therefore, when one submersible pump fails, the other submersible pump is operated under the control of alternating operation even though it is operated independently, so that the submersible pump can be efficiently operated. There is an inconvenience that it is difficult to drive. As a result, in the submersible pump system of Patent Document 1, the water level sensor for detecting the water level is liable to fail, and when one submersible pump fails, it is difficult to efficiently operate the remaining submersible pumps. There is a problem that it is.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to suppress the failure of the element for detecting the water level and to cause the failure of one submersible electric pump. It is an object of the present invention to provide a submersible electric pump system and a submersible electric pump capable of efficiently operating the remaining submersible electric pump even when the above occurs.

The submersible electric pump system according to the first aspect of the present invention includes a first submersible electric pump including a first control unit and a second submersible electric pump including a second control unit and operating alternately with the first submersible electric pump. A first communication unit provided in the first submersible electric pump and a second communication unit provided in the second submersible electric pump to perform wireless communication with the first communication unit are provided, and the first communication unit and the first communication unit are provided. The two communication units are configured so that the radio communication strength is attenuated when the water level rises and is placed in the water, and the first control unit and the second control unit are the first communication unit and the second communication unit. Control to alternately operate or suspend the first submersible electric pump and the second submersible electric pump according to the order of operation and suspension during alternate operation based on the availability of wireless communication or the change in signal strength of wireless communication. When wireless communication between the first communication unit and the second communication unit becomes impossible during the alternate operation, one of the first control unit and the second control unit is used according to the order of the alternate operation. , The corresponding one of the first submersible electric pump and the second submersible electric pump is configured to operate, and one of the first control unit and the second control unit is of the first communication unit and the second communication unit. It is configured to determine that the other of the first submersible electric pump and the second submersible electric pump is out of order when the wireless communication is not resumed after a lapse of a predetermined period.

In the submersible electric pump system according to the first aspect of the present invention, as described above, whether or not wireless communication is possible by the first communication unit and the second communication unit in which the wireless communication strength is attenuated when the water level rises and is placed in water. Alternatively, based on the change in the signal strength of the wireless communication, the first control unit and the second control unit use the first submersible electric pump and the second submersible electric pump, respectively, according to the order of operation and suspension during alternate operation. It is configured to control the operation or suspension alternately. 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, the electrode is not corroded or the electrode is not contaminated. As a result, it is possible to prevent the elements for detecting the water level (first communication unit and second communication unit) from failing. Further, when one of the first control unit and the second control unit does not restart after a lapse of a predetermined period after the wireless communication of the first communication unit and the second communication unit becomes impossible, the first submersible electric pump and the second Judge that the other of the submersible electric pumps is out of order. As a result, if one submersible electric pump fails, the remaining submersible electric pumps can stop controlling the alternate operation. For example, if one submersible electric pump fails, the remaining submersible electric pumps can switch from alternating operation control to independent operation control. As a result, the remaining submersible electric pumps can be efficiently operated, unlike the case where the remaining submersible electric pumps continuously perform the same control as in the alternate operation. As a result, it is possible to prevent the elements that detect the water level (first communication unit and second communication unit) from failing, and even if one submersible electric pump fails, the remaining submersible electric pumps are efficiently used. You can drive it well.

In the submersible electric pump system according to the first aspect, preferably, one of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order. When the water level cannot be detected due to the availability of wireless communication between the first communication unit and the second communication unit or the change in the signal strength of the wireless communication, the corresponding one of the first submersible electric pump and the second submersible electric pump is used. , It is configured to be operated and stopped by being controlled by an intermittent operation mode in which the unit is operated intermittently by itself. With this configuration, even if the water level cannot be detected due to the availability of wireless communication between the first communication unit and the second communication unit or the change in the signal strength of the wireless communication, the first submersible electric pump and the second submersible electric pump Of these, one that is not out of order can be operated independently and intermittently to drain water.

In a configuration in which one of the first submersible electric pump and the second submersible electric pump is controlled by an intermittent operation mode in which the first submersible electric pump and the second submersible electric pump are operated intermittently to operate and stop, the first control unit and the second control unit are preferable. When it is determined that the other of the first submersible electric pump and the second submersible electric pump is out of order, one of the first submersible electric pump and the second submersible electric pump is operated in the intermittent operation mode. At least of the control of intermittent operation at predetermined time intervals, the control of intermittent operation at random time intervals by the intermittent operation mode, and the control of intermittent operation at random operation times at random time intervals by the intermittent operation mode. It is configured to do one. With this configuration, one of the first submersible electric pump and the second submersible electric pump, which is not out of order, is operated intermittently at predetermined time intervals in the intermittent operation mode, so that the water level is caused by a substantially constant inflow of water. When the water level rises, drainage can be performed at predetermined time intervals, so that the rise in water level can be effectively suppressed. Further, one of the first submersible electric pump and the second submersible electric pump, which has not failed, is intermittently operated at random time intervals according to the intermittent operation mode, or is randomly operated at random time intervals according to the intermittent operation mode. By performing intermittent operation according to the operation time, even if the inflow of water is not constant, drainage can be performed at random timing.

In this case, preferably, one of the first control unit and the second control unit causes the corresponding one of the first submersible electric pump and the second submersible electric pump to be intermittently operated at set time intervals by the intermittent operation mode. In this case, when the operation and stop are repeated a set number of times, the corresponding one of the first submersible electric pump and the second submersible electric pump is configured to be switched to intermittent operation at set time intervals. With this configuration, it is more effective to operate the submersible electric pump at appropriate time when the time when water flows in and the water level rises is known to some extent from past results and operation history. Can be drained.

In the submersible electric pump system according to the first aspect, preferably, one of the first control unit and the second control unit does not resume wireless communication of the first communication unit and the second communication unit after a predetermined period of time has elapsed. , It is determined that the other of the first submersible electric pump and the second submersible electric pump is out of order, and the operation of the corresponding one of the first submersible electric pump and the second submersible electric pump is temporarily stopped. There is. With this configuration, even if wireless communication does not resume due to the failure of one submersible electric pump, the operation of the submersible electric pump during operation can be temporarily stopped, so that the water level drops. It is possible to prevent the submersible electric pump from running idle for a long time.

In the submersible electric pump system according to the first aspect, preferably, one of the first control unit and the second control unit is operated in the alternate operation by the corresponding one of the first submersible electric pump and the second submersible electric pump. In the case of the order of, when the wireless communication of the first communication unit and the second communication unit becomes impossible, one of the first submersible electric pump and the second submersible electric pump is operated, and after the first predetermined period elapses. If the wireless communication of the first communication unit and the second communication unit is not resumed, the operation of one of the first submersible electric pump and the second submersible electric pump is continued, even after the second predetermined period has elapsed. When the wireless communication of the first communication unit and the second communication unit is not resumed, it is configured to determine that the other of the first submersible electric pump and the second submersible electric pump is out of order, and the first control unit. And one of the second control units is that the wireless communication of the first communication unit and the second communication unit is performed when the corresponding one of the first submersible electric pump and the second submersible electric pump is not in the order of operation in the alternate operation. If it becomes impossible, if the wireless communication of the first communication unit and the second communication unit does not resume after the lapse of the first predetermined period, the corresponding operation of the first submersible electric pump and the second submersible electric pump is started. If the wireless communication of the first communication unit and the second communication unit does not resume after the second predetermined period has elapsed from the start of operation, it is determined that the other of the first submersible electric pump and the second submersible electric pump is out of order. It is configured in. With this configuration, when wireless communication becomes impossible due to the failure of the other of the first submersible electric pump and the second submersible electric pump, and if it is the order of operation in the alternate operation, the first predetermined period After the operation of the above and the operation of the additional second predetermined period, it can be determined that the other of the first submersible electric pump and the second submersible electric pump is out of order. In addition, if it is not the order of operation in the alternate operation, after waiting for the first predetermined period and then performing the chase operation for the second predetermined period, the other of the first submersible electric pump and the second submersible electric pump is out of order. You can judge.

In the submersible electric pump system according to the first aspect, preferably, one of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order. In this case, one of the first submersible electric pump and the second submersible electric pump is configured to be controlled to stop the operation based on the internal temperature change after the operation is started. With this configuration, even if the water level cannot be detected due to the availability of wireless communication between the first communication unit and the second communication unit or the change in the signal strength of the wireless communication, the submersible electric pump is based on the internal temperature change. Since the operation of the submersible electric pump can be stopped, it is possible to prevent the submersible electric pump from running idle for a long time due to a drop in the water level.

In the submersible electric pump system according to the first aspect, preferably, one of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order. In this case, one of the first submersible electric pump and the second submersible electric pump is configured to be controlled to stop the operation based on the change in the drive current after the operation is started. With this configuration, even if the water level cannot be detected due to the availability of wireless communication between the first communication unit and the second communication unit or the change in the signal strength of the wireless communication, the submersible electric pump is based on the change in the drive current. Since the operation of the submersible electric pump can be stopped, it is possible to prevent the submersible electric pump from running idle for a long time due to a drop in the water level.

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 timing of operation and suspension of the first submersible electric pump and the second submersible electric pump from being the same.

In the submersible electric pump system according to the first aspect, preferably, the first communication unit is arranged in the first submersible electric pump avoiding the metal portion, and the second communication unit avoids the metal portion in the second communication unit. It is located in the submersible electric pump. With this configuration, it is possible to prevent the wireless communication of the first communication unit and the second communication unit from being hindered by the metal portion.

The submersible electric pump according to the second aspect of the present invention is the submersible electric pump main body, the control unit for controlling the operation of the submersible electric pump main body, and other submersible electric pumps provided in the submersible electric pump main body and alternately operating. It includes a communication unit and a communication unit that performs wireless communication with each other, and the communication unit is configured so that when the water level rises and is placed underwater, the wireless communication strength with the communication unit of another submersible electric pump is attenuated. The control unit is operated and suspended during alternate operation with other submersible electric pumps based on the availability of wireless communication of the communication unit and the communication unit of other submersible electric pumps or the change in the signal strength of the wireless communication. The submersible electric pump main body is configured to alternately operate or stop according to the order, and the control unit communicates between the communication unit and the other submersible electric pump during the alternate operation with the other submersible electric pump. If the wireless communication with the unit becomes impossible, the submersible electric pump body is operated according to the order of the alternate operation, and if the wireless communication does not resume after a predetermined period of time, the alternate operation is performed. It is configured to determine that the submersible electric pump is out of order.

In the submersible electric pump according to the second aspect of the present invention, as described above, when the water level rises and the pump is placed underwater, the radio communication strength is attenuated. Based on the above, the control unit is configured to control the submersible electric pump main body to be alternately operated or deactivated according to the order of operation and deactivation during the alternate operation. 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, the electrode is not corroded or the electrode is not contaminated. As a result, it is possible to prevent the element (communication unit) that detects the water level from failing. Further, the control unit determines that another submersible electric pump is out of order when it does not resume after a predetermined period of time has elapsed since the wireless communication became impossible. As a result, if one submersible electric pump fails, the remaining submersible electric pumps can stop controlling the alternate operation. For example, if one submersible electric pump fails, the remaining submersible electric pumps can switch from alternating operation control to independent operation control. As a result, the remaining submersible electric pumps can be efficiently operated, unlike the case where the remaining submersible electric pumps continuously perform the same control as in the alternate operation. As a result, it is possible to suppress the failure of the element (communication unit) for detecting the water level, and to efficiently operate the remaining submersible electric pump even if a failure occurs in one submersible electric pump.

According to the present invention, as described above, it is possible to suppress the failure of the element that detects the water level and to efficiently operate the remaining submersible electric pump even if one submersible electric pump fails. Can be done.

It is a schematic diagram which showed the whole structure of the submersible electric pump system by 1st Embodiment of this invention. It is a block diagram which showed the control structure of the submersible electric pump by 1st Embodiment of this invention. It is a figure for demonstrating 1st operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the 2nd operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the 3rd operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the 4th operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the 5th operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the sixth operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the 7th operation example of the submersible electric pump system by 1st Embodiment of this invention. It is a figure for demonstrating the determination of the operation time of the submersible electric pump system by 1st Embodiment of this invention. It is a block diagram which showed the control structure of the submersible electric pump by 2nd Embodiment of this invention. It is a figure for demonstrating the water level at the position where the submersible electric pump according to the 2nd Embodiment of this invention is installed. It is a figure which showed an example of the temperature change when the water level of the submersible electric pump by the 2nd Embodiment of this invention is low. It is a figure which showed an example of the temperature change when the water level of the submersible electric pump by the 2nd Embodiment of this invention is high. It is a figure which showed the 1st example for demonstrating the stop timing of the submersible electric pump by 2nd Embodiment of this invention. It is a figure which showed the 2nd example for demonstrating the stop timing of the submersible electric pump by 2nd Embodiment of this invention. It is a figure which showed the 3rd example for demonstrating the stop timing of the submersible electric pump by the 2nd Embodiment of this invention. It is a block diagram which showed the control structure of the submersible electric pump by the 3rd Embodiment of this invention. It is a figure which showed an example of the current change when the water level of the submersible electric pump by the 3rd Embodiment of this invention is low. It is a figure which showed an example of the current change when the water level of the submersible electric pump by the 3rd Embodiment of this invention is high. It is a figure which showed the example for demonstrating the stop timing of the submersible electric pump according to the 3rd Embodiment of this invention.

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

(First Embodiment)
The first embodiment of the present invention will be described with reference to FIGS. 1 to 9.

(Configuration of submersible electric pump system)
The submersible electric pump system 100 according to the first 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. , Includes. 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 just one 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 just one 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 be supplied with commercial power or may be supplied with 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 be operated by supplying electric power from the AC power source 2. Further, the submersible electric pumps 3a and 3b are configured to be usable underwater. The submersible electric pumps 3a and 3b are configured to perform alternate operation in which one is operated and the other is stopped alternately when the water level rises and drains water. In addition, two submersible electric pumps 3a and 3b are chased by the other if the water level does not drop to the level at which the operation is stopped even after a predetermined time has elapsed since the drainage was started by one operation. It is configured to be drained by the operation of.

As shown in FIG. 2, the submersible electric pump 3a (3b) is operated by supplying AC power from the AC power supply 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 at all times or periodically. The communication unit 33 is configured to perform communication according to, for example, the Bluetooth (registered trademark) standard. The communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are configured so that the wireless communication strength is attenuated when the water level rises and the submersible electric pump 3b is placed underwater (underwater).

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 on the upper part of the submersible electric pump main body 31. It is desirable that the communication unit 33 is arranged so as to avoid a portion containing metal such as a motor 36, such as the upper part of the submersible electric pump main body 31. By arranging the communication unit 33 so as to avoid the portion containing the metal, it is possible to suppress the obstruction of communication by the metal portion.

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 lowers the voltage of the electric power supplied from the AC power supply 2 by using, for example, a capacitor and a resistor, and supplies 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 supply 2. By rotating the impeller, the motor 36 sucks water from the tank 1 and discharges the sucked water through the pipe 37.

The control unit 32 is configured to detect the water level based on whether or not the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are capable of wireless communication or a change in the signal strength of the wireless communication. Here, since the radio wave is hard 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, the wireless communication strength is attenuated. That is, in the control unit 32, the water level in the tank 1 is set to the communication unit of the submersible electric pump 3a based on the attenuation of the wireless communication strength by 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 detect that the water level is located above the communication unit 33 of the submersible electric pump 3b and 33. Further, 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 wireless communication intensity is equal to or higher than a predetermined value), and the water level in the tank 1 is reached. Is configured to detect that the water level is lower than the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b.

In the communication of the communication unit 33, a pulse signal is transmitted from one communication unit 33, and a response signal from the other communication unit 33 to the pulse signal is received by one communication unit 33. 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, the control unit 32 operates and pauses during the alternate operation based on whether or not the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are capable of wireless communication or the signal strength of the wireless communication is changed. According to the order, the submersible electric pumps 3a (3b) are configured to be controlled to alternately operate or stop. That is, based on the fact that the water level in the tank 1 becomes the ON water level or higher (the wireless communication strength becomes less than the predetermined value), one of the submersible electric pumps 3a and 3b is operated to drain the water in the tank 1. Drain. 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 (the wireless communication strength returns to the predetermined value or more). Specifically, after the wireless communication strength returns to the predetermined value or more, the operation of the submersible electric pump 3a or 3b during operation is stopped after the operation for a predetermined time. 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 the 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. 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 be operated. That is, the other of the dormant 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 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. ing.

Specifically, the control unit 32 alternately operates the submersible electric pumps 3a and 3b according to the order of transmission and reception of signals by wireless communication of 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 electric 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 in 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 ( (Stop first) Determine the order as a trailing pump. 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 the signal was later transmitted from the communication unit 33 (power was input later). T) 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 differs 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.

Here, in the first embodiment, in the control unit 32 of the submersible electric pump 3a (3b), the wireless communication strength of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b becomes small during the alternating operation. When wireless communication becomes impossible, the submersible electric pumps 3a (3b) are operated according to the order of alternating operations. Further, when the control unit 32 of the submersible electric pump 3a (3b) does not restart after a lapse of a predetermined period after 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 becomes impossible, the submersible electric pump 3a (3b) is submerged. It is configured to determine that the electric pump 3b (3a) is out of order. The predetermined period is set longer than the operating time required for normal drainage. As a result, it is possible to prevent the other submersible electric pump 3b (3a) from being mistakenly determined to be out of order when the wireless communication is not restarted in the drainage where no failure has occurred.

Further, in the first embodiment, the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order, and determines that the submersible electric pump 3a (3a) is out of order, and determines that the submersible electric pump 3a has a communication unit 33 and the submersible electric pump. When the water level cannot be detected due to the availability of wireless communication of the communication unit 33 of 3b or the change in the signal strength of wireless communication, the submersible electric pump 3a (3b) is controlled by the intermittent operation mode in which the submersible electric pump 3a (3b) is operated independently and intermittently. It is configured to start and stop.

Specifically, when the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order, the submersible electric pump 3a (3b) is predetermined by the intermittent operation mode. At least one of the control of intermittent operation at each time interval, the control of intermittent operation at random time intervals by the intermittent operation mode, and the control of intermittent operation at random operation times at random time intervals by the intermittent operation mode. It is configured to do one.

In the control for intermittent operation in the intermittent operation mode at predetermined time intervals, the control unit 32 operates the submersible electric pump 3a (3b) at predetermined time Te intervals as in the fourth operation example shown in FIG. It is configured in. For example, the control unit 32 is configured to operate the submersible electric pump 3a (3b) for 120 seconds at intervals of 60 minutes as a predetermined time Te. The operation interval and operation time are set to suit the capacity of the tank 1 and the amount of water flowing into the tank 1.

Further, in the control in which the intermittent operation is performed at random time intervals in the intermittent operation mode, the control unit 32 sets the operation intervals (Te1, Te2, Te3, Te4 ...) As in the fifth operation example shown in FIG. It is configured to operate the submersible electric pump 3a (3b) by setting it at random.

Further, in the control in which the intermittent operation is performed at random operation times in the intermittent operation mode, the control unit 32 is operated at the operation intervals (Te11, Te12, Te13, ...) As in the sixth operation example shown in FIG. ()) Is randomly set, and the operation time is randomly set to operate the submersible electric pump 3a (3b).

Further, in the first embodiment, the control unit 32 of the submersible electric pump 3a (3b) operates and stops the submersible electric pump 3a (3b) when the submersible electric pump 3a (3b) is intermittently operated at set time intervals in the intermittent operation mode. Is configured to switch the submersible electric pump 3a (3b) to intermittent operation at set time intervals when the above is repeated a set number of times. For example, the control unit 32 of the submersible electric pump 3a (3b) determines that the communication unit 33 has failed and sets the submersible electric pump 3a (3b) when it is repeatedly started and stopped a set number of times (about several times). It is configured to operate in a timer operation mode in which the submersible electric pump 3a (3b) is operated at the same time.

For example, as in the seventh operation example shown in FIG. 9, the control unit 32 of the submersible electric pump 3a (3b) controls the submersible electric pump 3a (3b) to operate at 7 o'clock for 1 minute and at 13 o'clock for 1 minute. do.

The time to be operated may be determined by machine learning from the operation history so far, or may be determined by the operator.

Further, in the first embodiment, the control unit 32 of the submersible electric pump 3a (3b) does not resume wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b after a predetermined period of time has elapsed. , It is determined that the submersible electric pump 3b (3a) is out of order, and the operation of the submersible electric pump 3a (3b) is temporarily stopped.

Further, the control unit 32 of the submersible electric pump 3a (3b) is a communication unit 33 of the submersible electric pump 3a and a communication unit of the submersible electric pump 3b when the submersible electric pumps 3a (3b) are in the order of operation in the alternate operation. When the wireless communication strength of 33 becomes low and wireless communication becomes impossible, the submersible electric pump 3a (3b) is operated to communicate with the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b after the lapse of the first predetermined period Tc. When the wireless communication of the submersible electric pump 3a is not resumed, the operation of the submersible electric pump 3a (3b) is continued, and the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b are continued even after the second predetermined period Td has further elapsed. When the wireless communication of the communication unit 33 does not resume, it is configured to determine that the submersible electric pump 3b (3a) is out of order. Further, the control unit 32 of the submersible electric pump 3a (3b) is a communication unit 33 of the submersible electric pump 3a and a communication unit of the submersible electric pump 3b when the submersible electric pumps 3a (3b) are not in the order of operation in the alternate operation. When the wireless communication strength of 33 becomes low and wireless communication becomes impossible, when the wireless communication of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b does not resume after the lapse of the first predetermined period Tc, underwater When the operation of the electric pump 3a (3b) is started and 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 after the lapse of the second predetermined period Td from the start of the operation, underwater It is configured to determine that the electric pump 3b (3a) is out of order.

(First operation example)
A first operation example of the submersible electric pump system 100 of the first embodiment will be described with reference to FIG. In the first operation example, when the submersible electric pumps 3a and 3b are alternately operated, a failure occurs in the submersible electric pump 3b, and at that time, the submersible electric pumps 3a are in the order of the alternate operation operations. An example of the case 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 the preceding pump that operates 3a first, the order of operation and suspension in the case of 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. 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, 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, 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 was suspended 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.

After that, at time t10, a failure occurs in the submersible electric pump 3b. As a result, 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. Here, in the submersible electric pump 3a, which is the order of the alternate operation, the control unit 32 determines that the water level in the tank 1 is equal to or higher than the ON water level. Then, since it is the order of operation, the control unit 32 of the submersible electric pump 3a operates the submersible electric pump 3a.

Even after the first predetermined period Tc has elapsed since the submersible electric pump 3a was operated at time t11 (after 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 became impossible). When 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, the control unit 32 of the submersible electric pump 3a continues the operation of the submersible electric pump 3a. At time t12, even after the second predetermined period Td has elapsed after the operation of the submersible electric pump 3a is continued, the wireless communication of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is resumed. If not, the control unit 32 of the submersible electric pump 3a determines that the submersible electric pump 3b is out of order. Further, at time t12, the control unit 32 of the submersible electric pump 3a stops the operation of the submersible electric pump 3a.

Further, after the time t12, the control unit 32 of the submersible electric pump 3a switches to the intermittent operation mode in which the submersible electric pump 3a is operated independently and intermittently for control. When the rest period Te elapses at the time t13, the control unit 32 of the submersible electric pump 3a operates the submersible electric pump 3a for the predetermined time Tf. After that, the submersible electric pump 3a is operated every Te for a predetermined time.

(Second operation example)
A second operation example of the submersible electric pump system 100 of the first embodiment will be described with reference to FIG. In the second operation example, when the submersible electric pumps 3a and 3b are alternately operated, a failure occurs in the submersible electric pump 3a, and at that time, the submersible electric pumps 3b are not in the order of the alternate operation. An example of is described.

In the submersible electric pumps 3a and 3b, when the order is determined and the alternate operation is performed, the submersible electric pump 3a fails at time t20. As a result, 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. Here, in the submersible electric pump 3b which is not in the order of the alternate operation, the control unit 32 determines that the water level in the tank 1 is equal to or higher than the ON water level. Then, since it is not the order of operation, the control unit 32 of the submersible electric pump 3b suspends (stands by) the submersible electric pump 3b.

Control of the submersible electric pump 3b when 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 even after the first predetermined period Tc has elapsed from the time t20 at the time t21. The unit 32 starts the operation of the submersible electric pump 3b (follow-up operation). At time t22, 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 even after the second predetermined period Td has elapsed since the operation of the submersible electric pump 3b was started. In this case, the control unit 32 of the submersible electric pump 3b determines that the submersible electric pump 3a is out of order. Further, at time t22, the control unit 32 of the submersible electric pump 3a stops the operation of the submersible electric pump 3b.

Further, after the time t22, the control unit 32 of the submersible electric pump 3b switches to the intermittent operation mode in which the submersible electric pump 3b is operated independently and intermittently for control. When the rest period Te elapses at the time t23, the control unit 32 of the submersible electric pump 3b operates the submersible electric pump 3b for the predetermined time Tf. After that, the submersible electric pump 3b is operated every Te for a predetermined time.

(Third operation example)
A third operation example of the submersible electric pump system 100 of the first embodiment will be described with reference to FIG. In the third operation example, when the submersible electric pumps 3a and 3b are alternately operated, at least one of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b fails. An example will be described.

In the submersible electric pumps 3a and 3b, when the order is determined and the alternate operation is performed, at least one of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b fails at time t30. Occurs. As a result, 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. Here, in the submersible electric pump 3a, which is the order of the alternate operation, the control unit 32 determines that the water level in the tank 1 is equal to or higher than the ON water level. Then, since it is the order of operation, the control unit 32 of the submersible electric pump 3a operates the submersible electric pump 3a. Further, in the submersible electric pump 3b which is not in the order of the alternate operation, the control unit 32 determines that the water level in the tank 1 is equal to or higher than the ON water level. Then, since it is not the order of operation, the control unit 32 of the submersible electric pump 3b suspends (stands by) the submersible electric pump 3b.

Even after the first predetermined period Tc has elapsed since the submersible electric pump 3a was operated at time t31 (after 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 became impossible). When 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, the control unit 32 of the submersible electric pump 3a continues the operation of the submersible electric pump 3a. Further, the control unit 32 of the submersible electric pump 3b starts the operation of the submersible electric pump 3a (chasing operation).

At time t32, even after the second predetermined period Td has elapsed after the operation of the submersible electric pump 3a is continued, the wireless communication of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b is resumed. If not, the control unit 32 of the submersible electric pump 3a determines that the submersible electric pump 3b is out of order. Further, at time t12, the control unit 32 of the submersible electric pump 3a stops the operation of the submersible electric pump 3a.

Further, even after the second predetermined period Td has elapsed from the start of the operation of the submersible electric pump 3b at the time t32, the wireless communication of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b still occurs. If it does not restart, the control unit 32 of the submersible electric pump 3b determines that the submersible electric pump 3a is out of order. Further, at time t32, the control unit 32 of the submersible electric pump 3b stops the operation of the submersible electric pump 3b.

Further, after the time t32, the control unit 32 of the submersible electric pump 3a (3b) switches to the intermittent operation mode in which the submersible electric pump 3a (3b) is operated independently and intermittently for control. When the rest period Te elapses at the time t33, the control unit 32 of the submersible electric pump 3a (3b) operates the submersible electric pump 3a (3b) for the predetermined time Tf. After that, the submersible electric pump 3a (3b) is operated every Te for a predetermined time.

(Determination of driving time)
With reference to FIG. 10, a process for determining the operating time of the submersible electric pump system 100 of the present embodiment will be described.

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 unit 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, and further lowers 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 varies 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 level of the signal strength 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 the start of the submersible electric pump main body 31 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 water level at which the operation is stopped.

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

In the first embodiment, as described above, whether or not wireless communication is possible by the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b whose wireless communication strength is attenuated when the water level rises and is placed in water. Alternatively, the control unit 32 is configured to control the submersible electric pumps 3a (3b) to be alternately operated or deactivated according to the order of operation and deactivation during the alternate operation based on the change in the signal strength of the wireless communication. Has been done. 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, the electrode is not corroded or the electrode is not contaminated. As a result, it is possible to prevent the element for detecting the water level (communication unit 33) from failing. Further, when the control unit 32 does not restart after a lapse of a predetermined period after 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 becomes impossible, another underwater operation is performed alternately. It is determined that the electric pump 3b (3a) is out of order. As a result, when one submersible electric pump 3b (3a) fails, the remaining submersible electric pumps 3a (3b) can stop controlling the alternate operation. For example, if one submersible electric pump 3b (3a) fails, the remaining submersible electric pumps 3a (3b) can switch from alternating operation control to independent operation control. As a result, the remaining submersible electric pumps 3a (3b) can be efficiently operated, unlike the case where the remaining submersible electric pumps 3a (3b) continuously perform the same control as in the alternate operation. As a result, it is possible to prevent the element for detecting the water level (communication unit 33) from failing, and even if one submersible electric pump 3b (3a) fails, the remaining submersible electric pump 3a (3b) Can be operated efficiently.

Further, in the first embodiment, as described above, the control unit 32 determines that the submersible electric pump 3b (3a) is out of order, and communicates with the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b. When the water level cannot be detected due to the availability of wireless communication of the unit 33 or the change in the signal strength of the wireless communication, the submersible electric pump 3a (3b) is controlled and operated by the intermittent operation mode in which the submersible electric pump 3a (3b) is operated independently and intermittently. And is configured to stop. As a result, even if the water level cannot be detected due to the availability of wireless communication of the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b or the change in the signal strength of the wireless communication, the submersible electric pump 3a and the submersible electric pump 3a and the submersible electric pump 3a. One of the pumps 3b, which is not out of order, can be independently operated intermittently to drain water.

Further, in the first embodiment, as described above, when the control unit 32 determines that the submersible electric pump 3b (3a) is out of order, the submersible electric pump 3a (3b) is predetermined by the intermittent operation mode. At least one of the control of intermittent operation at each time interval, the control of intermittent operation at random time intervals by the intermittent operation mode, and the control of intermittent operation at random operation times at random time intervals by the intermittent operation mode. It is configured to do one. As a result, the submersible electric pump 3a (3b) that has not failed is operated intermittently at predetermined time intervals in the intermittent operation mode, so that the water level rises due to the inflow of substantially constant water at predetermined time intervals. Since drainage can be performed, the rise in water level can be effectively suppressed. Further, the submersible electric pump 3a (3b) that has not failed is operated intermittently at random time intervals in the intermittent operation mode, or intermittently operated at random time intervals in the intermittent operation mode. Therefore, even if the inflow of water is not constant, drainage can be performed at random timing.

Further, in the first embodiment, as described above, the control unit 32 operates and stops the submersible electric pump 3a (3b) a set number of times when the submersible electric pump 3a (3b) is intermittently operated at each set time interval in the intermittent operation mode. When repeated, the submersible electric pump 3a (3b) is configured to be switched to intermittently operate at set time intervals. This makes it more effective to operate the submersible electric pump 3a (3b) at appropriate times when the time when water flows in and the water level rises is known to some extent from past results and operation history. Can be drained.

Further, in the first embodiment, as described above, the control unit 32 is submersible motorized when 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 after a predetermined period of time. It is configured to determine that the pump 3b (3a) is out of order and temporarily stop the operation of the submersible electric pump 3a (3b). As a result, even if wireless communication does not resume due to the failure of one submersible electric pump 3b (3a), the operation of the submersible electric pump 3a (3b) during operation can be temporarily stopped. It is possible to suppress the water level from dropping and the submersible electric pump 3a (3b) from running idle for a long time.

Further, in the first embodiment, as described above, in the control unit 32, when the submersible electric pumps 3a (3b) are in the order of operation in the alternate operation, the communication unit 33 of the submersible electric pump 3a and the submersible electric pump 3b When the wireless communication of the communication unit 33 becomes impossible, the submersible electric pump 3a (3b) is operated, and after the lapse of the first predetermined period Tc, the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are operated. When the wireless communication does not resume, the operation of the submersible electric pump 3a (3b) is continued, and the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are continued even after the second predetermined period Td has elapsed. When the wireless communication of the submersible electric pump 3b (3a) is not restarted, it is determined that the submersible electric pump 3b (3a) is out of order. Further, the control unit 32 cannot perform wireless communication between the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b when the submersible electric pumps 3a (3b) are not in the order of operation in the alternate operation. In this case, when 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 after the lapse of the first predetermined period Tc, the operation of the submersible electric pump 3a (3b) is started and operated. When 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 after the lapse of the second predetermined period Td from the start, it is determined that the submersible electric pump 3b (3a) is out of order. It is configured as follows. As a result, when wireless communication becomes impossible due to a failure of the submersible electric pump 3b (3a), and if it is the order of operation in the alternate operation, the operation of the first predetermined period Tc and the additional second predetermined After the operation for the period Td, it can be determined that the submersible electric pump 3b (3a) is out of order. Further, if it is not the order of the operations in the alternate operation, it may be determined that the submersible electric pump 3b (3a) is out of order after the chase operation is performed for the second predetermined period Td after the standby for the first predetermined period Tc. can.

Further, in the first embodiment, as described above, the control unit 32 operates 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. And 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 pump 3a and the submersible electric pump 3b from being operated and stopped at the same timing.

(Second Embodiment)
Next, the configuration of the submersible electric pump system 100 according to the second embodiment will be described with reference to FIGS. 11 to 17. In the second embodiment, unlike the first embodiment, when the wireless communication of the communication unit 33 becomes impossible and the water level cannot be detected, the submersible electric pump 3a (3b) is based on the temperature change. An example of a configuration for stopping the operation of 3a (3b) will be described. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 11, the submersible electric pumps 3a and 3b have a submersible electric pump main body 31 (see FIG. 1), a control unit 32, a communication unit 33, a cover 34, a pump control circuit 35, and a motor, respectively. 36 and a temperature detection unit 38 are included. 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 just one 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 just one example.

The temperature detecting unit 38 is configured to detect the temperature inside the submersible electric pump 3a (3b). Specifically, the temperature detection unit 38 detects the temperature inside the submersible electric pump 3a (3b) that changes due to the drive of the motor 36. In the submersible electric pump 3a (3b), the internal temperature rises by driving the motor 36.

Here, in the second embodiment, the control unit 32 of the submersible electric pump 3a (3b) has elapsed a predetermined period after 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 becomes impossible. If it does not restart later, it is configured to determine that the submersible electric pump 3b (3a) is out of order. Further, the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order, and determines that the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are out of order. When the water level cannot be detected due to the availability of wireless communication or a change in the signal strength of wireless communication, the submersible electric pump 3a (3b) is controlled by the intermittent operation mode in which the submersible electric pump 3a (3b) is operated independently and intermittently to operate and stop. It is configured as follows.

Further, in the second embodiment, the control unit 32 of the submersible electric pump 3a (3b) operates the submersible electric pump 3a (3b) when it is determined that the submersible electric pump 3b (3a) is out of order. After starting, it is configured to control to stop the operation based on the internal temperature change.

Specifically, the control unit 32 of the submersible electric pump 3a (3b) is configured to acquire the temperature detected by the temperature detection unit 38. Further, when the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order and operates the submersible electric pump 3a (3b) independently and intermittently. It is configured to stop the operation of the submersible electric pump 3a (3b) based on the acquired internal temperature of the submersible electric pump 3a (3b). That is, the control unit 32 of the submersible electric pump 3a (3b) starts the operation of the submersible electric pump 3a (3b) at each set time interval or at a set time. Then, the control unit 32 of the submersible electric pump 3a (3b) stops the operation of the submersible electric pump 3a (3b) based on the temperature detected by the temperature detection unit 38.

Further, when the submersible electric pump 3a (3b) is operated independently and intermittently, the submersible electric pump 3a (dT / dt) inside the submersible electric pump 3a (3b) is obtained. It is configured to stop the operation of 3b).

Here, when the water level of the tank 1 shown in FIG. 12 is lower than the water level L1 and the water level is low, the water level when the operation of the submersible electric pump 3a (3b) is started at the time t41 as in the example shown in FIG. The temperature rises slowly because the water level is low and the submersible electric pump 3a (3b) is idle and the operating load of the submersible electric pump 3a (3b) is small. Further, when the operation of the submersible electric pump 3a (3b) is stopped at the time t42, the temperature gradually decreases.

Further, when the water level of the tank 1 shown in FIG. 12 is higher than the water level L2 and the water level is high, the water level becomes high when the operation of the submersible electric pump 3a (3b) is started at the time t43 as in the example shown in FIG. Due to the high load of the submersible electric pump 3a (3b), the temperature rises sharply. Further, when the operation of the submersible electric pump 3a (3b) is stopped at the time t44, the temperature suddenly drops.

The control unit 32 detects the temperature change (dT / dt) in the case of the low water level and the temperature change (dT / dt) in the case of the high water level. Then, the control unit 32 determines that the water level has dropped based on the fact that the temperature change (dT / dt) has changed in the downward direction, and stops the operation of the submersible electric pump 3a (3b). The temperature change (dT / dt) in the case of a low water level and the temperature change (dT / dt) in the case of a high water level may be stored in advance in the memory 322, or the water level may be changed by the communication of the communication unit 33. It may be acquired based on the operation when it can be detected and stored in the memory 322.

In the first example shown in FIG. 15, the water level is high (higher than the water level L2) until the time t51, the water level is medium (between the water level L1 and the water level L2) from the time t51 to the time t52, and the water level is low (water level) from the time t52. A case where the value is lower than L1) will be described.

At time t50, the control unit 32 of the submersible electric pump 3a (3b) starts the operation of the submersible electric pump 3a (3b). The water level becomes low (lower than the water level L1) at time t52. Then, from the time t52 to the time t53, the temperature change (dT / dt) changes so as to become smaller. In this case, the control unit 32 of the submersible electric pump 3a (3b) determines that the water level has dropped based on the small change in the temperature change (dT / dt) (turned downward on the graph). At time t53, the operation of the submersible electric pump 3a (3b) is stopped. The control unit 32 determines to stop the operation of the submersible electric pump 3a (3b) at the time t52, and actually stops the operation at the time t53. Between the time t52 and the time t53 is the control delay time. After stopping the operation of the submersible electric pump (3b) at time t53, the temperature drop will be further accelerated.

In the second example shown in FIG. 16, a case where the water level is medium (between the water level L1 and the water level L2) up to the time t55 and the water level is low (lower than the water level L1) from the time t55 will be described.

At time t54, the control unit 32 of the submersible electric pump 3a (3b) starts the operation of the submersible electric pump 3a (3b). The water level becomes low (lower than the water level L1) at time t55. Then, from the time t55 to the time t56, the temperature change (dT / dt) changes so as to become smaller. In this case, the control unit 32 of the submersible electric pump 3a (3b) determines that the water level has dropped based on the small change in the temperature change (dT / dt) (turned downward on the graph). , The operation of the submersible electric pump 3a (3b) is stopped at time t56. The control unit 32 determines to stop the operation of the submersible electric pump 3a (3b) at the time t55, and actually stops the operation at the time t56. Between the time t55 and the time t56 is the control delay time. After stopping the operation of the submersible electric pump (3b) at time t56, the temperature drop will be further accelerated.

In the third example shown in FIG. 17, the water level is low (lower than the water level L1) until the time t58, the water level is medium (between the water level L1 and the water level L2) from the time t58 to the time t59, and the water level is low (water level) from the time t59. A case where the value is lower than L1) will be described. That is, at time t58, water is flowing into the tank 1.

At time t57, the control unit 32 of the submersible electric pump 3a (3b) starts the operation of the submersible electric pump 3a (3b). At time t58, the temperature change (dT / dt) becomes large. In this case, the control unit 32 of the submersible electric pump 3a (3b) determines that the water level has risen. The water level becomes low (lower than the water level L1) at time t59. Then, from the time t59 to the time t60, the temperature change (dT / dt) changes so as to become small. In this case, the control unit 32 of the submersible electric pump 3a (3b) determines that the water level has dropped based on the small change in the temperature change (dT / dt) (turned downward on the graph), and determines that the water level has dropped. At time t60, the operation of the submersible electric pump 3a (3b) is stopped. After stopping the operation of the submersible electric pump (3b) at time t60, the temperature drop will be further accelerated.

Other configurations of the second embodiment are the same as those of the first embodiment.

(Effect of the second embodiment)
In the second embodiment, as in the first embodiment, when the element for detecting the water level (communication unit 33) is suppressed from failing and one submersible electric pump 3b (3a) fails. However, the remaining submersible electric pumps 3a (3b) can be operated efficiently.

Further, in the second embodiment, as described above, the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order, and determines that the submersible electric pump 3a (3b) is out of order. Is configured to stop the operation of the submersible electric pump 3a (3b) based on the acquired internal temperature of the submersible electric pump 3a (3b) when the submersible electric pump 3a (3b) is operated independently. As a result, even if the water level cannot be detected due to communication by the communication unit 33, it is possible to determine that the water level has dropped during operation and stop the operation of the submersible electric pump 3a (3b) at an accurate water level. can. As a result, the idle operation of the submersible electric pump 3b (3a) can be effectively suppressed.

Further, the other effects of the second embodiment are the same as those of the first embodiment.

(Third Embodiment)
Next, the configuration of the submersible electric pump system 100 according to the third embodiment will be described with reference to FIGS. 18 to 23. In the third embodiment, unlike the second embodiment, when the wireless communication of the communication unit 33 cannot be performed and the water level cannot be detected, the change in the current for driving the submersible electric pump 3a (3b) is used. An example of a configuration for stopping the operation of the submersible electric pump 3a (3b) will be described. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 18, the submersible electric pumps 3a and 3b have a submersible electric pump main body 31 (see FIG. 1), a control unit 32, a communication unit 33, a cover 34, a pump control circuit 35, and a motor, respectively. 36 and. The pump control circuit 35 has a current detection unit 39. 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 just one 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 just one example.

The current detection unit 39 is configured to detect the drive current of the motor 36 of the submersible electric pump 3a (3b). In the submersible electric pump 3a (3b), when the water level is high and the load is large, the current for driving the motor 36 becomes large.

Here, in the third embodiment, the control unit 32 of the submersible electric pump 3a (3b) has elapsed a predetermined period since the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b cannot perform wireless communication. If it does not restart later, it is configured to determine that the submersible electric pump 3b (3a) is out of order. Further, the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order, and determines that the communication unit 33 of the submersible electric pump 3a and the communication unit 33 of the submersible electric pump 3b are out of order. When the water level cannot be detected due to the availability of wireless communication or a change in the signal strength of wireless communication, the submersible electric pump 3a (3b) is controlled by the intermittent operation mode in which the submersible electric pump 3a (3b) is operated independently and intermittently to operate and stop. It is configured as follows.

Further, in the third embodiment, the control unit 32 of the submersible electric pump 3a (3b) operates the submersible electric pump 3a (3b) when it is determined that the submersible electric pump 3b (3a) is out of order. After starting, it is configured to control to stop the operation based on the change of the drive current.

Specifically, the control unit 32 of the submersible electric pump 3a (3b) is configured to acquire the drive current detected by the current detection unit 39. Further, when the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order and operates the submersible electric pump 3a (3b) independently and intermittently. It is configured to stop the operation of the submersible electric pump 3a (3b) based on the acquired drive current of the submersible electric pump 3a (3b). That is, the control unit 32 of the submersible electric pump 3a (3b) starts the operation of the submersible electric pump 3a (3b) at each set time interval or at a set time. Then, the control unit 32 of the submersible electric pump 3a (3b) stops the operation of the submersible electric pump 3a (3b) based on the drive current detected by the current detection unit 39.

Further, when the submersible electric pump 3a (3b) is operated independently and intermittently, the submersible electric pump 3a (dI / dt) based on the acquired change in the drive current (dI / dt) of the submersible electric pump 3a (3b) ( It is configured to stop the operation of 3b).

Here, when the water level of the tank 1 shown in FIG. 12 is lower than the water level L1 and the water level is low, the water level is low and the water level is low when the operation of the submersible electric pump 3a (3b) is started as in the example shown in FIG. Since the electric pump 3a (3b) is idle and the operating load of the submersible electric pump 3a (3b) is small, the drive current is small. Further, when the operation of the submersible electric pump 3a (3b) is stopped, the drive current immediately becomes 0.

Further, when the water level of the tank 1 shown in FIG. 12 is higher than the water level L1, when the operation of the submersible electric pump 3a (3b) is started as in the example shown in FIG. 20, the load of the submersible electric pump 3a (3b) is applied. Since it is larger than the idling time (when the water level of the tank 1 is lower than the water level L1), the drive current becomes larger than the idling time. Further, when the operation of the submersible electric pump 3a (3b) is stopped, the drive current immediately becomes 0.

Further, when the water level becomes low and becomes lower than the water level L1, the drive current suddenly drops, and the vehicle operates while sucking both water and air for a while, and then idles. The control unit 32 detects the current change (dI / dt) when the water level becomes low. Then, the control unit 32 determines that the water level has dropped based on the fact that the current change (dI / dt) has changed in the downward direction, and stops the operation of the submersible electric pump 3a (3b). The current change (dI / dt) when the water level becomes low may be stored in advance in the memory 322, or is acquired based on the operation when the water level can be detected by the communication of the communication unit 33 and stored in the memory. It may be stored in 322. Further, the control unit 32 detects a current change (vibrating current change) when the water level becomes low and the vehicle operates while sucking both water and air (until it spins), and the submersible electric pump 3a (3b). ) May be stopped.

In the example shown in FIG. 21, a case where the water level is up to the time t62 (higher than the water level L1) and the water level is low from the time t62 (lower than the water level L1) will be described.

At time t61, the control unit 32 of the submersible electric pump 3a (3b) starts the operation of the submersible electric pump 3a (3b). The water level becomes low (lower than the water level L1) at time t62. Then, from the time t62, the change changes so that the current change (dI / dt) becomes small. In this case, the control unit 32 of the submersible electric pump 3a (3b) determines that the water level has dropped based on the small change in the current change (dI / dt) (turned downward on the graph). At time t63, the operation of the submersible electric pump 3a (3b) is stopped. The control unit 32 determines to stop the operation of the submersible electric pump 3a (3b) at the time t62, and actually stops the operation at the time t63. Between the time t62 and the time t63 is the control delay time. When the operation of the submersible electric pump (3b) is stopped at time t63, the drive current becomes zero.

Other configurations of the third embodiment are the same as those of the first embodiment.

(Effect of the third embodiment)
In the third embodiment, as in the first embodiment, when the element for detecting the water level (communication unit 33) is suppressed from failing and one submersible electric pump 3b (3a) fails. However, the remaining submersible electric pumps 3a (3b) can be operated efficiently.

Further, in the third embodiment, as described above, the control unit 32 of the submersible electric pump 3a (3b) determines that the submersible electric pump 3b (3a) is out of order, and determines that the submersible electric pump 3a (3b) is out of order. Is configured to stop the operation of the submersible electric pump 3a (3b) based on the acquired drive current of the submersible electric pump 3a (3b) when the submersible electric pump 3a (3b) is operated independently. As a result, even if the water level cannot be detected due to communication by the communication unit 33, it is possible to determine that the water level has dropped during operation and stop the operation of the submersible electric pump 3a (3b).

Further, the other effects of the third embodiment are the same as those of the first embodiment.

(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 first to third embodiments, an example of a configuration in which two submersible electric pumps are provided in a 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 first to third embodiments, an example of a configuration in which the order of operation and suspension in the alternate operation is determined based on the order of transmission and reception of signals by the communication units of the two submersible electric pumps. As shown, the present invention is not limited to this. In the present invention, the communication units of the plurality of submersible electric pumps may transmit and receive different individual identification information by wireless communication to determine the order of operation and suspension during alternate operation. For example, individual identification information represented by numbers, alphabets, etc. is transmitted and received via the communication unit, and the transmitted individual identification information is compared with the received individual identification information of the other party, based on a predetermined rule. The order of operation and suspension during alternate operation may be determined.

Further, in the first to third embodiments, an example of the 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 first to third embodiments, 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 first to third embodiments, an example of the 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 a region 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 facility.

Further, in the first to third embodiments, the 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.

Further, in the first to third embodiments, an example of a configuration in which the communication unit is operated by an external electric power is shown, but the present invention is not limited to this. In the present invention, the communication unit may be operated by a battery provided in the submersible electric pump. Further, when a battery is provided, a pump control circuit, a control unit, and a communication unit may be mounted on one printed circuit board, and power may be supplied from the battery only to the communication unit. Further, in this case, the pump control circuit and the control unit may also be supplied with electric power from the battery. The battery may also be mounted on the printed circuit board.

Further, the printed circuit board and the battery may be stored in a waterproof case so that even if the inside of the pump is flooded, these portions may not be flooded. Further, the waterproof case may be opened and closed to enable battery replacement. In addition, information may not be included in the communication by the communication unit as much as possible, and the battery may be prevented from being consumed by detecting the water level by the minimum communication to the extent that communication is possible. Further, the battery may be a primary battery or a secondary battery that can be charged from an AC power source. With this configuration, the communication unit can be driven independently of the submersible electric pump. Therefore, even if one of the submersible electric pumps fails or the power is turned off, the communication unit and the other It is possible to continue the operation of the submersible electric pump by bidirectionally communicating with the submersible electric pump.

Further, in the second embodiment, when it is determined that the submersible electric pump 3b (3a) is out of order, the temperature change (dT / dt) inside the submersible electric pump 3a (3b) is obtained. , Although an example configured to control the operation of the submersible electric pump 3a (3b) is shown, the present invention is not limited to this. In the present invention, even if the submersible electric pump 3b (3a) is not out of order, the submersible electric pump 3a (3b) is based on the acquired internal temperature change (dT / dt) of the submersible electric pump 3a (3b). It may be configured to control the operation.

Further, in the third embodiment, when it is determined that the submersible electric pump 3b (3a) is out of order, underwater is based on the current change (dI / dt) of the submersible electric pump 3a (3b) acquired. Although an example configured to control the operation of the electric pump 3a (3b) is shown, the present invention is not limited to this. In the present invention, even when the submersible electric pump 3b (3a) is not out of order, the submersible electric pump 3a (3b) is operated based on the acquired current change (dI / dt) of the submersible electric pump 3a (3b). It may be configured to be controlled.

Further, in the third embodiment, when it is determined that the submersible electric pump 3b (3a) is out of order, the acquired current change (dI / dt) (current unit time) of the submersible electric pump 3a (3b) is obtained. An example is shown in which the operation of the submersible electric pump 3a (3b) is controlled based on the rate of change per hit), but the present invention is not limited to this. In the present invention, the operation may be controlled when a change in the current value occurs, such as stopping the operation when the current of the submersible electric pump 3a (3b) drops. Further, this control may be configured to be performed even when the submersible electric pump 3b (3a) is not out of order.

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 (11)

The first submersible electric pump including the first control unit,
A second submersible electric pump that includes a second control unit and operates alternately with the first submersible electric pump.
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.
The first communication unit and the second communication unit are configured so that the radio communication strength is attenuated when the water level rises and the second communication unit is placed in the water.
The first control unit and the second control unit are operated and suspended during alternate operation based on whether or not the first communication unit and the second communication unit can perform wireless communication or the signal strength of the wireless communication changes. According to the order, the first submersible electric pump and the second submersible electric pump are configured to be controlled to alternately operate or stop, respectively.
When wireless communication between the first communication unit and the second communication unit becomes impossible during the alternate operation, one of the first control unit and the second control unit performs the first underwater according to the order of the alternate operation. It is configured to operate the corresponding one of the electric pump and the second submersible electric pump.
When one of the first control unit and the second control unit does not restart after a lapse of a predetermined period after the wireless communication between the first communication unit and the second communication unit becomes impossible, the first submersible electric pump And a submersible electric pump system configured to determine that the other of the second submersible electric pumps is out of order. One of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order, and determines that the first communication unit and the second submersible electric pump are out of order. When the water level cannot be detected due to the availability of wireless communication in the communication unit or the change in the signal strength of wireless communication, the corresponding one of the first submersible electric pump and the second submersible electric pump is operated independently and intermittently. The submersible electric pump system according to claim 1, wherein the submersible electric pump system is configured to be operated and stopped by being controlled by an intermittent operation mode. When one of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order, the first submersible electric pump and the second submersible electric pump are described. Control to operate one of the second submersible electric pumps intermittently at predetermined time intervals according to the intermittent operation mode, control to operate the second submersible electric pump intermittently at random time intervals according to the intermittent operation mode, and random operation according to the intermittent operation mode. The submersible electric pump system according to claim 2, wherein at least one of the controls for intermittent operation is performed at random operation times at various time intervals. One of the first control unit and the second control unit causes the corresponding one of the first submersible electric pump and the second submersible electric pump to be intermittently operated at set time intervals by the intermittent operation mode. In this case, when the operation and the stop are repeated a set number of times, the corresponding one of the first submersible electric pump and the second submersible electric pump is configured to be switched to intermittent operation at set time intervals. , The submersible electric pump system according to claim 3. One of the first control unit and the second control unit is the first submersible electric pump and the second submersible electric pump when the wireless communication of the first communication unit and the second communication unit does not resume after a predetermined period of time has elapsed. Claims 1 to 4 are configured to determine that the other of the submersible electric pumps is out of order and temporarily stop the operation of the corresponding one of the first submersible electric pump and the second submersible electric pump. The submersible electric pump system according to any one of the above items. One of the first control unit and the second control unit is the first communication unit when the corresponding one of the first submersible electric pump and the second submersible electric pump is in the order of operation in the alternate operation. And when the wireless communication of the second communication unit becomes impossible, the corresponding one of the first submersible electric pump and the second submersible electric pump is operated, and after the lapse of the first predetermined period, the first communication unit and the said When the wireless communication of the second communication unit is not resumed, the operation of one of the first submersible electric pump and the second submersible electric pump is continued, and the first submersible electric pump is continued even after the second predetermined period has elapsed. When the wireless communication between the communication unit and the second communication unit is not resumed, it is configured to determine that the other of the first submersible electric pump and the second submersible electric pump is out of order.
One of the first control unit and the second control unit is the first communication unit when the corresponding one of the first submersible electric pump and the second submersible electric pump is not in the order of operation in the alternate operation. And when the wireless communication of the second communication unit becomes impossible, and the wireless communication of the first communication unit and the second communication unit does not resume after the lapse of the first predetermined period, the first submersible electric pump and the said. When one of the corresponding operations of the second submersible electric pump is started and the wireless communication between the first communication unit and the second communication unit does not resume after the lapse of the second predetermined period from the start of the operation, the first underwater operation is started. The submersible electric pump system according to any one of claims 1 to 5, which is configured to determine that the other of the electric pump and the second submersible electric pump is out of order. When one of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order, the first submersible electric pump and the second submersible electric pump are described. One of claims 1 to 6, wherein the corresponding one of the second submersible electric pumps is controlled to stop the operation based on the internal temperature change after the operation is started. Submersible electric pump system described in. When one of the first control unit and the second control unit determines that the other of the first submersible electric pump and the second submersible electric pump is out of order, the first submersible electric pump and the second submersible electric pump are described. One of claims 1 to 6, wherein the corresponding one of the second submersible electric pumps is controlled to stop the operation based on the change in the drive current after the operation is started. Submersible electric pump system described in. 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 any one of claims 1 to 8. The first communication unit is arranged in the first submersible electric pump while avoiding the metal portion.
The submersible electric pump system according to any one of claims 1 to 9, wherein the second communication unit is arranged in the second submersible electric pump while avoiding a metal portion. Submersible electric pump body and
A control unit that controls the operation of the submersible electric pump body,
The submersible electric pump main body is provided with a communication unit of another submersible electric pump that alternately operates and a communication unit that wirelessly communicates with each other.
The communication unit is configured so that the wireless communication strength with the communication unit of the other submersible electric pump is attenuated when the water level rises and is placed in the water.
The control unit operates during alternating operation with the other submersible electric pumps based on the availability of wireless communication between the communication unit and the communication unit of the other submersible electric pump or a change in the signal strength of the wireless communication. It is configured to control the operation or suspension of the submersible electric pump main body alternately according to the order of suspension.
When the communication unit and the communication unit of the other submersible electric pump cannot wirelessly communicate with each other during the alternate operation of the control unit, the submersible electric pump is in accordance with the order of the alternate operation. Underwater, which is configured to determine that the other submersible electric pumps that are performing alternate operation are out of order when the main unit is operated and wireless communication is disabled and does not resume after a predetermined period of time has elapsed. Electric pump.

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