JP7039980B2 - Drive control module for submersible electric pumps and submersible electric pumps - Google Patents

Description

The present invention relates to a drive control module for a submersible electric pump and a submersible electric pump.

Conventionally, a submersible electric pump including a liquid level sensor is known (see, for example, Patent Document 1).

The above-mentioned Patent Document 1 includes a submersible electric pump main body, a control component, and two liquid level sensors arranged at different height positions, and automatically starts / stops when the liquid level sensor is detected. An automatic submersible electric pump to perform is disclosed. The control component includes a drive circuit (main circuit) that controls to drive the motor based on the signal of the liquid level sensor, and a relay circuit (control circuit) having a relay that opens and closes the drive circuit. The control parts are arranged inside the submersible electric pump body.

Japanese Patent Application Laid-Open No. 2003-286990

However, in the submersible electric pump of Patent Document 1, since the control parts are arranged inside the submersible electric pump main body, it is possible to change from the automatic type to a different drive system such as a non-automatic type or an automatic alternating type. However, when it is necessary to use a submersible electric pump having a drive system different from that of the automatic type, there is a problem that a submersible electric pump must be prepared separately. In addition, since the control parts are located inside the submersible electric pump body, the submersible electric pump body must be disassembled in order to replace the control parts, which makes the replacement work of the control parts complicated. There are also problems. The non-automatic type is a drive system in which the drive is not started or stopped unless the user performs a predetermined operation. The automatic alternating type is a driving method of a submersible electric pump used as a set with an automatic submersible electric pump, and in principle, is a driving method of a submersible electric pump that is alternately driven with an automatic submersible electric pump.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to drive a submersible electric pump by a different drive method without separately preparing a submersible electric pump. It is an object of the present invention to provide a drive control module and a submersible electric pump for a submersible electric pump which is possible and whose control parts can be easily replaced.

In order to achieve the above object, the drive control module for the submersible electric pump according to the first aspect of the present invention is provided with a housing portion detachably attached to the head cover of the submersible electric pump body and a submersible electric pump body. The liquid level sensor that detects the liquid level in the drainage area and the liquid level sensor are placed inside the housing while being connected to the liquid level sensor by wiring, and the submersible electric pump body is driven based on the detection signal of the liquid level sensor. A control component for controlling is provided, and the housing portion includes a first housing portion and a second housing portion that are separably combined with each other, and the first housing portion is configured to be attached to the head cover. Further, a rod-shaped mounting member extending in the vertical direction to which the liquid level sensor is mounted is further provided, and the first housing portion and the second housing portion are the first holding portion and the second holding portion for holding the mounting member, respectively. The first holding portion and the second holding portion are configured to hold the mounting member by combining the first housing portion and the second housing portion with each other .

In the drive control module for the submersible electric pump according to the first aspect of the present invention, as described above, the housing portion detachably attached to the head cover of the submersible electric pump body is connected to the liquid level sensor by wiring. It is provided with a control component that is arranged inside the housing and controls the drive of the submersible electric pump body based on the detection signal of the liquid level sensor. As a result, the housing portion in which the control parts are arranged can be attached to and detached from the submersible electric pump main body without removing the head cover of the submersible electric pump main body. Can be installed as an automatic or automatic alternating drive type submersible electric pump driven based on the detection signal of the liquid level sensor. Then, by attaching / detaching and replacing the drive control module, it is possible to change from an automatic type to a non-automatic type submersible electric pump of another drive type. That is, since the drive system can be changed for one submersible electric pump body by attaching / detaching the housing portion, the submersible electric pump can be driven by a different drive system without separately preparing the submersible electric pump. can. Further, the housing portion includes a first housing portion and a second housing portion that are combined so as to be separable from each other, and the first housing portion is configured to be attached to the head cover. In this way, by configuring the housing portion to be detachable from the submersible electric pump main body, the control parts can be easily replaced without disassembling the submersible electric pump main body. As described above, even a non-automatic operation type submersible electric pump can be automatically operated based on the detection result of the liquid level sensor by attaching the drive control module of the present invention, and the control parts can be easily replaced. can do.
Further, with a simple configuration, the liquid level sensor mounting member can be attached to the first housing portion and the second housing portion. Further, in order to attach the mounting member of the liquid level sensor to the first housing portion and the second housing portion, a configuration separate from the first housing portion and the second housing portion is provided for the first housing portion and the second housing portion. The device configuration can be simplified as compared with the case where it is installed in the second housing portion.

In the drive control module for the submersible electric pump according to the first aspect, preferably, the non-automatic submersible electric pump main body is provided by the liquid level sensor and the control component by being attached to the non-automatic submersible electric pump main body. It is configured so that it can be driven and controlled as an automatic type or an automatic alternating type.

In the drive control module for the submersible electric pump according to the first aspect, preferably, the divided surface between the first housing portion and the second housing portion is the same as the axial direction of the rotation shaft of the submersible electric pump main body. It extends in the longitudinal direction of the submersible electric pump body. With this configuration, the split surface extends in the longitudinal direction of the submersible electric pump main body. Therefore, when the first housing and the second housing are divided, the control component is moved in the longitudinal direction of the submersible electric pump main body. On the other hand, it can be exposed to the side. As a result, the control parts can be easily replaced from the side of the submersible electric pump main body.

In this case, preferably, the housing portion is arranged so as to straddle both the head cover of the submersible electric pump main body and the motor in the axial direction. With this configuration, the housing is placed at a relatively high position so that it straddles both the head cover and the motor, so compared to the case where the housing is placed at a low position, the power cable and Wiring with the cable of the liquid level sensor and attachment to the submersible electric pump body can be performed more easily.

In the drive control module for the submersible electric pump according to the first aspect, preferably, the first housing portion extends in the axial direction of the rotation axis of the submersible electric pump main body, and the first portion to which the control component is attached and the first portion. It extends in a direction substantially orthogonal to the axial direction, and has one end side connected to the first portion from the submersible electric pump main body side and the other end side having a second portion attached to the head cover. With this configuration, the first housing portion can be arranged along the shape of the submersible electric pump main body by the first portion and the second portion, so that the first housing portion is the submersible electric pump main body. It is possible to suppress the protrusion from the.

In this case, preferably, the first portion of the first housing portion is arranged substantially parallel to the dividing surface between the first housing portion and the second housing portion, and faces the outer surface of the submersible electric pump main body. It is arranged substantially parallel to the divided surface, has an inner surface on the side opposite to the submersible electric pump main body side with respect to the outer surface, and a side on which control parts are attached, and is formed in a flat plate shape or a box shape. The second housing portion is formed in a box shape attached to the first portion so as to cover the control component, and the first housing portion is assembled in the assembling direction on the split surface between the first housing portion and the second housing portion. The length of the first portion of the housing portion is smaller than the length of the second housing portion. With this configuration, in the assembly direction, the length of the first portion of the first housing portion is larger than the length of the second housing portion, as compared with the case where the length of the first housing portion is larger than the length of the second housing portion. When the body portion is removed, a wider range of control components attached to the first housing portion can be exposed. As a result, the replacement work of the control component can be performed more easily.

In the drive control module for the submersible electric pump according to the first aspect, preferably, in the upper part of the housing portion, the first wiring for introducing the other end of the wiring whose one end is connected to the power supply into the inside of the housing portion. An introduction port and a second wiring introduction port for introducing the other end of the wiring whose one end is connected to the liquid level sensor inside the housing portion are provided. With this configuration, the power cable and the liquid level sensor cable can be introduced into the drive control module from the upper part of the housing portion, and wiring work with the control component can be easily performed.

In this case, preferably, the control component is arranged at the lower part of the housing portion and the transformer arranged at the lower part of the housing portion, and the wiring introduced from the first wiring introduction port to the inside of the housing portion is from above. Includes at least an electromagnetic contactor to be connected. With this configuration, the transformer and magnetic contactor are arranged in the lower part of the housing portion, so that a space for arranging the wiring connected to the transformer and the electromagnetic contactor can be secured in the upper part of the housing portion. ..

The submersible electric pump in the second aspect of the present invention has a submersible electric pump main body, a housing portion detachably attached to the head cover of the submersible electric pump main body, and a liquid level in a drainage region where the submersible electric pump main body is installed. A liquid level sensor for detection and a control component that is placed inside the housing while being connected to the liquid level sensor by wiring and controls the drive of the submersible electric pump body based on the detection signal of the liquid level sensor. The housing portion includes a first housing portion and a second housing portion that are separably combined with each other, and the first housing portion is configured to be attached to the head cover, and a liquid level sensor is attached . A rod-shaped mounting member extending in the vertical direction is further provided, and the first housing portion and the second housing portion have a first holding portion and a second holding portion for holding the mounting member, respectively. The sandwiching portion and the second sandwiching portion are configured to sandwich the mounting member by combining the first housing portion and the second housing portion with each other .

In the submersible electric pump according to the second aspect of the present invention, as described above, the housing portion is detachably attached to the head cover of the submersible electric pump body, and the housing portion is connected to the liquid level sensor by wiring. A control component that is arranged inside and controls the drive of the submersible electric pump body based on the detection signal of the liquid level sensor is provided. As a result, the housing portion in which the control parts are arranged can be attached to and detached from the submersible electric pump main body without removing the head cover of the submersible electric pump main body. Can be installed as an automatic or automatic alternating drive type submersible electric pump driven based on the detection signal of the liquid level sensor. Then, by removing the drive control module or the like, it is possible to change from an automatic type to a non-automatic type submersible electric pump of another drive type. That is, since the drive system can be changed for one submersible electric pump body by attaching / detaching the housing portion, the submersible electric pump can be driven by a different drive system without separately preparing the submersible electric pump. can. Further, the housing portion includes a first housing portion and a second housing portion that are combined so as to be separable from each other, and the first housing portion is configured to be attached to the head cover. Thereby, by dividing the housing portion into the first housing portion and the second housing portion, the control parts can be easily replaced without disassembling the submersible electric pump main body. As described above, it is possible to provide a submersible electric pump capable of driving the submersible electric pump by a different drive method without separately preparing a submersible electric pump and easily exchanging control parts.
Further, with a simple configuration, the liquid level sensor mounting member can be attached to the first housing portion and the second housing portion. Further, in order to attach the mounting member of the liquid level sensor to the first housing portion and the second housing portion, a configuration separate from the first housing portion and the second housing portion is provided for the first housing portion and the second housing portion. The device configuration can be simplified as compared with the case where it is installed in the second housing portion.

According to the present invention, as described above, the submersible electric pump can be driven by different drive methods without separately preparing the submersible electric pump, and the control parts can be easily replaced.

It is a schematic diagram which showed the whole structure of the automatic type submersible electric pump by one Embodiment of this invention. It is a schematic diagram which showed the whole structure of the automatic alternating type submersible electric pump by one Embodiment of this invention. It is a perspective view which showed the housing part of the drive control module of the automatic type submersible electric pump by one Embodiment of this invention. It is a side view which shows the disassembled state of the drive control module of the automatic type submersible electric pump by one Embodiment of this invention. It is a front view of the 1st housing part and the control component of the drive control module of the automatic type submersible electric pump by one Embodiment of this invention. It is a partially enlarged view of the Q part of FIG. It is a figure which showed the circuit structure of the drive control module of the automatic type submersible electric pump by one Embodiment of this invention. It is a figure which showed the circuit structure of the drive control module of the automatic alternating type submersible electric pump by one Embodiment of this invention. It is a figure for demonstrating operation of the alternating type and the automatic alternating type submersible electric pump by one Embodiment of this invention.

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

(Structure of automatic type and automatic alternating type submersible electric pump)
The submersible electric pumps 100 and 200 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9. The submersible electric pump 100 shown in FIG. 1 and the submersible electric pump 200 shown in FIG. 2 according to one embodiment are both vertical submersible electric pumps in which the rotating shaft 2 extends in the vertical direction (Z direction). Further, the submersible electric pumps 100 and 200 are automatic type and automatic alternating type submersible electric pumps, respectively.

Specifically, in the submersible electric pump 100 shown in FIG. 1, by attaching the drive control module 102 to the non-automatic submersible electric pump main body 101, the liquid level sensor 7 and the control component 9 described later of the drive control module 102 are used. The non-automatic submersible electric pump main body 101 can be driven and controlled as an automatic type.

Further, the submersible electric pump 200 shown in FIG. 2 is non-automatic by attaching the drive control module 103 to the non-automatic submersible electric pump main body 101 and by the liquid level sensor 207 and the control component 9 described later of the drive control module 103. The submersible electric pump main body 101 of the type can be driven and controlled as an automatic alternating type.

The non-automatic type is a submersible electric pump in which the submersible electric pump body 101 itself does not determine the start and stop of driving even if the liquid level in the predetermined drainage area where the submersible electric pump body 101 is installed fluctuates. It is a drive system (type). That is, the non-automatic type is a driving method of a submersible electric pump that does not start and stop driving unless the user performs a predetermined operation. On the other hand, the automatic submersible electric pump 100 and the automatic alternating submersible electric pump 200 can be started and stopped without the user performing a predetermined operation.

The automatic type starts driving when the liquid level in the drainage region rises and reaches a predetermined drive liquid level, and at the same time, the liquid level in the drainage region drops from the drive liquid level to reach a predetermined stop liquid level. It is a drive system of a submersible electric pump configured to stop the drive when the drive is stopped. The automatic submersible electric pump may be stopped immediately when the stop liquid level is reached, or may be stopped after a predetermined time.

The automatic alternating type is a drive system of the submersible electric pump 200 used as a set with the automatic submersible electric pump 100. In principle, the automatic submersible electric pump 100 and the automatic alternating submersible electric pump 200 detect the liquid level at which the next liquid level sensor starts operation once a series of operations from the start to the stop are performed. However, the operation is not started and remains stopped, and when the liquid level sensor detects the liquid level at which the operation is started, the operation is started and the operation is controlled to switch between the operation state and the stop state alternately. Details will be described later.

(Composition of submersible electric pump body)
The submersible electric pump main body 101 will be described with reference to FIG. The submersible electric pump 100 of FIG. 1 and the submersible electric pump 200 of FIG. 2 include a submersible electric pump main body 101 having the same structure. Therefore, in the following, the submersible electric pump main body 101 of the submersible electric pump 100 will be described, and the description of the submersible electric pump main body 101 of the submersible electric pump 200 will be omitted.

As shown in FIG. 1, the submersible electric pump main body 101 is arranged in a motor 1, a rotary shaft 2, a pump chamber 3, an oil chamber 4, a mechanical seal 41, an oil lifter 42, and a pump chamber 3. It includes an impeller 5 and a head cover 6.

The motor 1 is sealed so that water from the outside does not enter. Further, the motor 1 drives the rotary shaft 2 to rotate. The motor 1 is configured to rotationally drive the impeller 5 via the rotating shaft 2. Further, the motor 1 includes a stator 11, a rotor 12, and a motor casing 13. The stator 11 has a coil and is arranged on the outer peripheral portion of the motor 1. Further, the stator 11 is configured by a three-phase motor so as to generate a magnetic field by being supplied with electric power from a three-phase alternating current power supply P via wirings U1, V1, V2, W1 and W2. The rotor 12 is attached to the rotating shaft 2 and is arranged inside the motor 1 so as to face the stator 11 in the radial direction. Further, the rotor 12 is configured to be rotated by a magnetic field from the stator 11. The motor casing 13 covers the stator 11 and the rotor 12. The outer surface 13a of the motor casing 13 faces the drive control module 102 in the horizontal direction (radial direction of the rotating shaft 2).

The rotating shaft 2 is configured to rotate by being driven by the motor 1. An impeller 5 is attached to the lower end of the rotating shaft 2. The rotating shaft 2 is configured to transmit the driving force of the motor 1 to the impeller 5. The rotation axis 2 (impeller 5) is configured to rotate clockwise (J direction shown in FIG. 1) in a plan view (when viewed from above). The rotating shaft 2 is rotatably supported by bearings 21 and 22. The rotary shaft 2 is arranged so as to extend from the motor 1 through the oil chamber 4 to the pump chamber 3.

An impeller 5 is arranged in the pump chamber 3. Further, the pump chamber 3 has a suction port 31 and a discharge port 32. The suction port 31 is arranged directly under the impeller 5, and the discharge port 32 is arranged on the side of the impeller 5. The submersible electric pump 100 is installed in a drainage region (not shown) and sucks water from the suction port 31 into the pump chamber 3. By rotating, the impeller 5 gives velocity energy to the water absorbed into the pump chamber 3 and converts the velocity energy of the water into pressure energy in the pump chamber 3. As a result, the impeller 5 is configured to discharge water from the discharge port 32 via the flow path 33.

The oil chamber 4 is arranged between the motor 1 and the pump chamber 3, and the oil chamber 4 is filled with oil. Further, a mechanical seal 41 is provided in the oil chamber 4. The mechanical seal 41 has sliding portions (not shown) on the load side (pump chamber 3 side) and the non-load side (opposite side to the pump chamber 3, that is, the motor 1 side), respectively. .. The sliding portion on the load side has a function of preventing (suppressing) the pressure water of the pump chamber 3 from flowing into the oil chamber 4. Further, the sliding portion on the non-load side has a function of preventing (suppressing) the fluid containing oil in the oil chamber 4 from flowing into the motor 1 side. The sliding portion is lubricated by the oil filled in the oil chamber 4 and cooled so as not to be seized.

The oil lifter 42 is provided around the rotary shaft 2 of the oil chamber 4 and has a tubular shape surrounding the rotary shaft 2. The oil lifter 42 is configured to lift oil upward as the rotating shaft 2 rotates. That is, the oil lifter 42 is configured to supply oil to the sliding portion on the counterload side of the mechanical seal 41. A through hole 42a is provided in the lower portion of the oil lifter 42. The through hole 42a is configured to guide oil to the inner peripheral side of the oil lifter 42. The oil lifter 42 is configured to return the oil lifted upward from the upper end side to the outer peripheral side of the oil lifter 42.

The head cover 6 is a hollow cover member attached to the upper part of the submersible electric pump 100. The head cover 6 is configured to close the opening above the motor casing 13. The head cover 6 is configured so that the drive control module 102 can be attached (detachable) on the upper surface. The upper portion of the head cover 6 is provided with a ground wire G and a through hole 6a for introducing the wirings U1, V1, V2, W1, and W2 into the head cover 6.

The ground wire G and the wirings U1, V1, and W1 are wirings that are bundled by the cabtire cable D and introduced from the power supply P side. Wiring V2 and W2 are wirings in which one end is connected to the downstream side of the wiring V1 and W1 and the other end is connected to the motor 1 side via an electromagnetic contactor 92 described later, respectively. The four ground wires G and the wirings U1, V1 and W1 bundled by the cabtire cable D are separated into individual wirings in the head cover 6.

(Configuration of drive control module for automatic submersible electric pump)
Next, the configuration of the drive control module 102 of the automatic submersible electric pump 100 will be described with reference to FIGS. 1 and 3 to 7.

As shown in FIG. 1, the drive control module 102 includes a housing portion 8, a control component 9, a liquid level sensor 7, and a mounting member 7a.

The housing portion 8 is configured to be detachably attached to the head cover 6 (see FIG. 1). The housing portion 8 includes a first housing portion 81 and a second housing portion 82 that are separably combined with each other. The control component 9 includes a transformer 91 (see FIG. 4) and an electromagnetic contactor 92 (see FIG. 4). The mounting member 7a is a member to which the liquid level sensor 7 is mounted and sandwiched by the first housing portion 81 and the second housing portion 82.

The first housing portion 81 and the second housing portion 82 are arranged so as to straddle both the head cover 6 of the submersible electric pump main body 101 and the motor 1 in the axial direction (Z direction). That is, the first housing portion 81 and the second housing portion 82 are arranged so as to be arranged side by side with the head cover 6 and the motor 1.

The first housing portion 81 is configured to be attached to the upper surface of the head cover 6. The first housing portion 81 has a first portion 81a and a second portion 81b (a portion surrounded by the alternate long and short dash line in FIG. 4).

The first portion 81a is configured to extend in the axial direction (Z direction) of the rotating shaft 2 of the submersible electric pump main body 101. The first portion 81a is formed in a box shape having an opening on the side opposite to the submersible electric pump main body 101 side (the A1 direction side described below). The outer surface 810 of the first portion 81a faces the outer surface 13a of the motor casing 13 of the submersible electric pump main body 101.

In the following, of the horizontal directions, the direction from the rotation axis 2 toward the drive control module 102 is the A1 direction, and the opposite direction is the A2 direction. The A direction is a direction substantially orthogonal to the outer surface 810 of the first portion 81a. Further, of the horizontal directions, the direction orthogonal to the A direction is defined as the B direction. Further, of the B directions, the direction along the counterclockwise direction of the rotation axis 2 in the plan view is the B1 direction, and the opposite direction is the B2 direction. The A2 direction is an example of the "assembly direction" in the claims.

The dividing surface 8a between the first housing portion 81 and the second housing portion 82 is in the longitudinal direction (Z direction) of the submersible electric pump main body 101 as in the axial direction (Z direction) of the rotary shaft 2 of the submersible electric pump main body 101. Extends in the direction). Further, the dividing surface 8a extends in the B direction. The dividing surface 8a generally has a rectangular shape with the Z direction as the longitudinal direction and the B direction as the lateral direction.

The first portion 81a is configured so that the transformer 91 and the electromagnetic contactor 92 are attached to the inner surface 811 side. The inner surface 811 is a surface opposite to the submersible electric pump main body 101 with respect to the outer surface 810 and to which the transformer 91 and the electromagnetic contactor 92 are attached. In the drive control module 103 (see FIG. 2) of the automatic alternating type submersible electric pump 200 (see FIG. 2), the control board 93 described later is arranged at the position indicated by the two-dot chain line in FIG.

As shown in FIG. 1, the second portion 81b is configured to extend in a direction substantially orthogonal to the axial direction (Z direction). The second portion 81b is configured such that one end side (A1 direction side) is connected to the first portion 81a from the submersible electric pump main body 101 side, and the other end side (A2 direction side) is attached to the head cover 6.

That is, the second portion 81b is one end side (A1 direction side) away from the rotating shaft 2 in the vertical direction (Z direction), does not overlap with the submersible electric pump main body 101, and is the other end side close to the rotating shaft 2 (the other end side (A1 direction side). (A2 direction side), it is arranged so as to overlap with the submersible electric pump main body 101.

At the upper part of the second portion 81b, a ground wire G whose one end is connected to the power supply P and the other ends of the wirings U1, V1 and W1 are provided in the first wiring introduction port 812 for introducing the inside of the first housing portion 81. Has been done. That is, a through-hole-shaped first wiring introduction port 812 to which the cabtire cable D is attached is provided above the second portion 81b.

The cabtire cable D is attached to the first wiring introduction port 812 (second portion 81b) from above by bolts b via the rubber packing K1. The rubber packing K1 is arranged between the cabtire cable D and the upper surface of the second portion 81b.

The second portion 81b, together with the cabtire cable D, is attached to the head cover 6 from above by bolts b via the rubber packing K2. The rubber packing K2 is arranged between the lower surface of the second portion 81b and the upper surface of the head cover 6.

The second portion 81b is provided with a through hole 813 that communicates with the through hole 6a on the upper surface of the head cover 6 from above directly below the first wiring introduction port 812. The head cover 6 and the housing portion 8 communicate with each other through the through hole 6a of the head cover 6 and the through hole 813 of the housing portion 8. As a result, the head cover 6 and the housing portion 8 form one liquid-tight internal space.

Inside the second portion 81b, a communication hole 814 extending in the A direction for communicating the first wiring introduction port 812 and the through hole 813 with the internal space of the first portion 81a and the second housing portion 82 (FIG. 4). See).

Wiring V1 and W1 and wiring V2 and W2 are passed through the communication hole 814. As shown in FIG. 7, one end of each of the wirings V1 and W1 is connected to the power supply P, and the other end is connected to the magnetic contactor 92. One end of each of the wirings V2 and W2 is connected to the magnetic contactor 92, and the other end is connected to the motor 1 side.

As shown in FIG. 1, the second housing portion 82 is formed in a box shape attached to the first portion 81a of the first housing portion 81 so as to cover the electromagnetic contactor 92 and the transformer 91. That is, the second housing portion 82 is formed in a box shape having an opening on the submersible electric pump main body 101 side (A2 direction side). The second housing portion 82 is configured to be assembled to the first housing portion 81 by being moved from the A1 direction side of the first housing portion 81 to the A2 direction. The second housing portion 82 is fixed to the first housing portion 81 by bolts (not shown).

A second wiring introduction port 82a for introducing the other end of the wiring C whose one end is connected to the liquid level sensor 7 inside the second housing portion 82 is provided on the upper portion of the second housing portion 82. A connector N for wiring C, one end of which is connected to the liquid level sensor 7, is attached to the second wiring introduction port 82a. The connector N is attached to the second wiring introduction port 82a via a rubber packing K3 arranged between the connector N and the upper surface of the second housing portion 82.

As shown in FIG. 4, in the assembling direction (A direction) of the first housing portion 81 and the second housing portion 82, the length L1 of the first portion 81a of the first housing portion 81 is the second. The length of the housing portion 82 is smaller than the length L2 (L1 <L2). That is, the side wall extending in the A direction of the box-shaped first portion 81a is smaller than the side wall extending in the A direction of the box-shaped second housing portion 82.

As shown in FIG. 5, a groove portion 815 is provided on the divided surface 8a of the first portion 81a of the first housing portion 81. The groove portion 815 is formed in an annular shape extending along the outer edge (parting surface 8a) of the first portion 81a when viewed from the A direction. An O-ring R is fitted in the groove portion 815. The groove portion 815 is recessed in the A2 direction from the dividing surface 8a.

As shown in FIG. 4, a convex portion 82b is provided on the divided surface 8a of the second housing portion 82. The convex portion 82b is formed in an annular shape extending along the dividing surface 8a. The convex portion 82b is formed in an annular shape corresponding to the groove portion 815. The convex portion 82b protrudes in the A2 direction. The convex portion 82b is configured to fit into the groove portion 815. That is, the convex portion 82b is fitted into the groove portion 815 when the second housing portion 82 is assembled to the first housing portion 81.

As shown in FIG. 6, the convex portion 82b is configured to compress the O-ring R installed in the groove portion 815 by fitting the convex portion 82b into the groove portion 815. In this way, the drive control module 102 prevents water from entering the inside of the first housing portion 81 and the second housing portion 82 from the dividing surface 8a of the first housing portion 81 and the second housing portion 82. It is configured to be able to prevent.

As shown in FIG. 3, the first housing portion 81 (first portion 81a) and the second housing portion 82 have a first holding portion 816 and a second holding portion 82c for sandwiching the mounting member 7a. ing. The mounting member 7a is a round bar-shaped member extending in the vertical direction, and is a member to which the liquid level sensor 7 is mounted.

The first sandwiching portion 816 is recessed in the A2 direction and has a semicircular shape in a plan view. The second sandwiching portion 82c is recessed in the A1 direction and has a semicircular shape in a plan view. The second holding portion 82c is arranged on the A1 direction side of the first holding portion 816. The first holding portion 816 and the second holding portion 82c are configured to hold the mounting member 7a by combining the first housing portion 81 and the second housing portion 82 with each other. The first holding portion 816 and the second holding portion 82c are configured so that the vertical position of the mounting member 7a can be adjusted by changing the holding position of the mounting member 7a.

As shown in FIG. 4, in the electromagnetic contactor 92, the wirings V1 and W1 introduced into the inside of the first housing portion 81 from the first wiring introduction port 812 of the second portion 81b of the first housing portion 81. Is connected from above. Further, from the electromagnetic contactor 92, wirings V2 and W2 for connecting to the motor 1 are introduced into the head cover 6. Further, the connector connected to the wiring C from the liquid level sensor 7 is introduced into the second housing portion 82 from the second wiring introduction port 82a, and the connector connected to the transformer 91 and the electromagnetic contactor 92 is formed. Be connected. The transformer 91 is connected to the other ends of the wirings T1 and T2 (see FIG. 7) whose one end is connected to the magnetic contactor 92. The transformer 91 and the magnetic contactor 92 are arranged side by side (so as to be arranged in the B direction) under the first housing portion 81. As a result, the first housing portion 81 and the second housing portion 82 secure a space for arranging the wirings V1, V2, W1, W2, and C connected to the transformer 91 and the electromagnetic contactor 92 in the upper part inside. It is possible to do.

As shown in FIG. 7, the drive control module 102 is provided with a liquid level sensor side circuit 70 formed by a transformer 91, an electromagnetic contactor 92, and a liquid level sensor 7.

The transformer 91 is configured to transform the electric power supplied from the power supply P to a low voltage for the liquid level sensor side circuit 70 (liquid level sensor 7). For example, the transformer 91 is configured to transform the 200V power supplied from the power supply P to 24V.

The magnetic contactor 92 is configured to open and close the main circuit for turning on / off the motor 1 based on the detection result of the liquid level sensor 7. The circuit configuration of the submersible electric pump 100 will be described later.

The liquid level sensor 7 includes an upper float switch (hereinafter referred to as an upper float) 71 and a lower float switch (hereinafter referred to as a lower float) 72.

The upper float 71 is attached to the attachment member 7a. The lower float 72 is attached to the mounting member 7a on the lower side of the upper float 71. The upper float 71 and the lower float 72 are configured so that their positions in the vertical direction can be adjusted by changing the mounting position on the mounting member 7a.

(Circuit configuration of automatic submersible electric pump)
Next, with reference to FIG. 7, the circuit configuration of the automatic submersible electric pump 100 will be briefly described.

In the submersible electric pump 100, a total of four wires, a ground wire G connected to the ground and wires U1, V1, and W1 connected to the three-phase AC power supply P, are bundled by a cabtire cable D and externally connected. Introduced from. The ground wire G is electrically connected to the pump casing outer member (motor bracket) in the head cover 6. The wiring U1 is directly connected to the motor 1 without being connected to the magnetic contactor 92. The wirings V1 and W1 are introduced into the housing portion (first housing portion 81 and the second housing portion 82) via the communication holes 814 of the first housing portion 81, respectively, and are introduced into the electromagnetic contactor 92. It is connected. Then, the wirings V2 and W2 connected to the electromagnetic contactor 92 are introduced into the head cover 6 and connected to the motor 1. The ground wire G, the wiring U1, and the detachable connection terminals (share plugs) S of the wirings V2 and W2 described later are arranged in the head cover 6.

Power of a predetermined voltage is supplied to the transformer 91 from the wirings V1 and W1 via the wirings T1 and T2.

In the liquid level sensor side circuit 70, the wiring C from the upper float 71 and the lower float 72 is connected to the transformer 91 and the electromagnetic contactor 92. In the liquid level sensor side circuit 70, the upper float 71 and the lower float 72 are arranged in parallel with each other. In the liquid level sensor side circuit 70, the upper float 71 and the transformer 91 are connected in series.

<Operation of magnetic contactor>
The operation of the electromagnetic contactor 92 will be described.

Both the upper float 71 and the lower float 72 are turned on when facing downward (a state where water is not detected) and turned off when facing upward (a state where water is detected). It is a contact switch.

When both the upper float 71 and the lower float 72 are facing downward, a current flows through the liquid level sensor side circuit 70, and an electromagnet (not shown) in the electromagnetic contactor 92 generates a magnetic force. In this state, the motor 1 is stopped.

Then, from the state where the liquid level rises and the upper float 71 and the lower float 72 both face downward, the lower float 72 faces upward, and further, the liquid level rises and the upper float 71 faces upward. Since no current flows through the liquid level sensor side circuit 70, the magnetic force generated by the electromagnet in the electromagnetic contactor 92 is lost, and the opening and closing of the switch in the electromagnetic contactor 92 is reversed. As a result, a current flows from the wiring V1 (wiring on the power supply P side) to the wiring V2 (wiring on the motor 1 side), and a current flows from the wiring W1 (wiring on the power supply P side) to the wiring W2 (wiring on the motor 1 side). Since it flows, the motor 1 starts driving.

Then, from the state where the liquid level is lowered and the upper float 71 and the lower float 72 are both facing upward, the upper float 71 faces downward, and further, the liquid level is lowered and the lower float 72 faces downward. Then, the current flows through the liquid level sensor side circuit 70 again, so that the magnetic force generated by the electromagnet in the electromagnetic contactor 92 is generated. Therefore, the opening and closing of the switch in the magnetic contactor 92 is reversed, and the motor 1 stops driving.

(Configuration of drive control module for automatic alternating submersible electric pump)
Next, the configuration of the drive control module 103 of the automatic alternating type submersible electric pump 200 will be described with reference to FIGS. 2 and 8. The same components as those of the drive control module 102 are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 2, the drive control module 102 includes a liquid level sensor 207 and a control board 93 provided in addition to the transformer 91 and the electromagnetic contactor 92 as control components 9 for controlling the drive of the submersible electric pump. There is.

The liquid level sensor 207 is a medium float arranged between an upper float switch (hereinafter referred to as an upper float) 271, a lower float switch (hereinafter referred to as a lower float) 272, and an upper float 271 and a lower float 272. It includes a switch (hereinafter referred to as a medium float) 273.

The lower float 272 is arranged at substantially the same height as the lower float 72 (see FIG. 1) of the drive control module 102 (see FIG. 1). The middle float 273 is arranged below the upper float 71 (see FIG. 1) of the drive control module 102. The upper float 271 is arranged above the upper float 71 of the drive control module 102.

As shown in FIG. 8, the lower float 272, the middle float 273, and the upper float 271 are each connected to the control board 93 by the wiring C. Further, various wirings from the transformer 91 and the electromagnetic contactor 92 are connected to the control board 93.

As shown in FIG. 2, the control board 93 is arranged inside the housing portion 8 (first housing portion 81 and the second housing portion 82) above the transformer 91 and the electromagnetic contactor 92. .. The control board 93 has a smaller width in the A direction than the transformer 91 and the magnetic contactor 92.

The control board 93 is configured to control the alternate operation of the submersible electric pump 200 used as a set with the submersible electric pump 100 (see FIG. 1). Specifically, the control board 93 controls the drive of the submersible electric pump main body 101 based on the detection signals of the lower float 272, the middle float 273, and the upper float 271.

(Operation of submersible electric pump)
Next, with reference to FIG. 9, the operation of the automatic submersible electric pump 100 and the automatic alternating submersible electric pump 200 will be described.

The level (liquid level) at which the lower float 72 of the submersible electric pump 100 and the lower float 272 of the submersible electric pump 200 detect the liquid level is defined as H1. The level (liquid level) at which the middle float 273 of the submersible electric pump 200 detects the liquid level is defined as H2. The level (liquid level) at which the upper float 71 of the submersible electric pump 100 detects the liquid level is defined as H3. The level (liquid level) at which the upper float 271 of the submersible electric pump 200 detects the liquid level is defined as H4.

In the initial state, it is assumed that the liquid level is lower than H1. That is, it is assumed that the submersible electric pump 100 and the submersible electric pump 200 are in a stopped state.

Then, when the liquid level rises to H2, the middle float 273 of the submersible electric pump 200 takes an upward posture and detects the liquid level. As a result, the submersible electric pump 200 starts driving under the control of the control board 93.

Then, when the liquid level drops to H1, the lower float 272 becomes a downward posture and does not detect the liquid level, and the submersible electric pump 200 stops driving under the control of the control board 93. Further, the submersible electric pump 200 is in the once stop mode under the control of the control board 93.

The one-time stop mode is a mode in which the submersible electric pump 200 is not driven even if the liquid level rises to H2 and the middle float 273 is in an upward posture to detect the liquid level. say. In the one-time stop mode, the middle float 273 of the submersible electric pump 200 is in an upward posture to detect the liquid level during the one-time stop mode, and the liquid level is further lowered to lower the middle float 273 and the lower float 272. Ends when the posture becomes downward and the liquid level is not detected. It should be noted that the reason why the liquid level is lowered during the one-time stop mode of the submersible electric pump 200 is the drive of the submersible electric pump 100 described below, or the submersible electric pump 100 and the submersible electric pump when the liquid level rises to H4. It is driven by the simultaneous operation of two 200 units.

Then, when the liquid level rises to H3 during the one-time stop mode, the upper float 71 takes an upward posture to detect the liquid level, and the submersible electric pump 100 starts driving. Then, while the liquid level is decreasing, the submersible electric pump 200 is released from the once stop mode under the control of the control board 93. In this way, the submersible electric pumps 100 and 200 are controlled to operate alternately.

When the liquid level suddenly rises to H4 due to an abnormal increase in water or the like, the submersible electric pump 200 is always driven regardless of whether or not it is in the one-time stop mode. That is, when the liquid level rises to H4 and the upper float 271 of the submersible electric pump 200 is in an upward posture to detect the liquid level, both the submersible electric pumps 100 and 200 are driven.

(Detachment of drive control module and replacement of control parts)
In the automatic submersible electric pump 100, the drive system can be changed to the non-automatic type by removing the drive control module 102 from the submersible electric pump main body 101. Similarly, in the automatic alternating type submersible electric pump 200, the drive system can be changed to the non-automatic type by removing the drive control module 103 from the submersible electric pump main body 101.

The submersible electric pump main body 101 can be used as an automatic submersible electric pump 100 by attaching the drive control module 102 again. Similarly, the submersible electric pump main body 101 can be used as an automatic alternating type submersible electric pump 200 by attaching the drive control module 103 again.

The submersible electric pumps 100 and 200 have a liquid level sensor by removing the second housing portion 82 from the first housing portion 81 to expose the control component 9 to which various wirings from the liquid level sensor 7 and the like are connected. 7 and the control component 9 can be removed and easily replaced.

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

In the present embodiment, as described above, the housing portion 8 detachably attached to the head cover 6 of the submersible electric pump main body 101 and the housing portion 8 are arranged inside the housing portion 8 in a state of being connected to the liquid level sensor 7 by wiring. A control component 9 that controls the drive of the submersible electric pump main body 101 based on the detection signal of the liquid level sensor 7 is provided. As a result, the housing portion 8 in which the control component 9 is arranged can be attached to and detached from the submersible electric pump main body 101 without removing the head cover 6 of the submersible electric pump main body 101, so that the non-automatic submersible electric pump can be attached and detached. The housing portion 8 can be attached to the submersible electric pump 100 or 200, which is an automatic type or an automatic alternating type drive type driven based on the detection signal of the liquid level sensor 7. Then, by attaching / detaching and replacing the drive control module 102 (103), the submersible electric pump 100 or 200 of another drive type such as an automatic type can be changed to a non-automatic type. That is, since the drive system can be changed for one submersible electric pump main body 101 by attaching / detaching the housing portion 8, the submersible electric pump is driven by a different drive system without separately preparing a submersible electric pump. be able to. Further, the housing portion 8 includes a first housing portion 81 and a second housing portion 82 that are combined so as to be separable from each other, and the first housing portion 81 is configured to be attached to the head cover 6. In this way, by configuring the housing portion 8 to be detachable from the submersible electric pump main body 101, the control component 9 can be easily replaced without disassembling the submersible electric pump main body 101. As described above, even a non-automatic operation type submersible electric pump can be automatically operated based on the detection result of the liquid level sensor 7 (207) by attaching the drive control module 102 (103) of the present invention. At the same time, the control component 9 can be easily replaced.

Further, in the present embodiment, as described above, the dividing surface 8a of the first housing portion 81 and the second housing portion 82 is submersible motorized in the same manner as in the axial direction of the rotary shaft 2 of the submersible electric pump main body 101. It extends in the longitudinal direction of the pump body 101. As a result, the split surface 8a extends in the longitudinal direction of the submersible electric pump main body 101. Therefore, when the first housing and the second housing are divided, the control component 9 is moved in the longitudinal direction of the submersible electric pump main body 101. On the other hand, it can be exposed to the side. As a result, the replacement work of the control component 9 can be easily performed from the side of the submersible electric pump main body 101.

Further, in the present embodiment, as described above, the housing portion 8 is arranged so as to straddle both the head cover 6 of the submersible electric pump main body 101 and the motor 1 in the axial direction. As a result, the housing portion 8 is arranged at a relatively high position so as to straddle both the head cover 6 and the motor 1, so that the power cable and the power cable are arranged as compared with the case where the housing portion 8 is arranged at a low position. Wiring of the liquid level sensor 7 (207) to the cable and attachment to the submersible electric pump main body 101 can be performed more easily.

Further, in the present embodiment, as described above, the first housing portion 81 extends in the axial direction of the rotary shaft 2 of the submersible electric pump main body 101, and also extends in the axial direction with the first portion 81a to which the control component 9 is attached. One end side is connected to the first portion 81a from the submersible electric pump main body 101 side, and the other end side has a second portion 81b attached to the head cover 6. As a result, the first housing portion 81 can be arranged along the shape of the submersible electric pump main body 101 by the first portion 81a and the second portion 81b, so that the first housing portion 81 is a submersible electric pump. It is possible to suppress the protrusion from the main body 101.

Further, in the present embodiment, as described above, the first portion 81a of the first housing portion 81 is arranged substantially in parallel with the dividing surface 8a of the first housing portion 81 and the second housing portion 82. The outer surface 810 facing the outer surface of the submersible electric pump main body 101 is arranged substantially parallel to the dividing surface 8a, and the control component 9 is attached to the outer surface 810 on the opposite side of the submersible electric pump main body 101 side. It has an inner surface 811 on the side and is formed in a box shape, and the second housing portion 82 is formed in a box shape attached to the first portion 81a so as to cover the control component 9, and the first housing portion 81 is formed. The length L1 of the first portion 81a of the first housing portion 81 is smaller than the length L2 of the second housing portion 82 in the assembling direction on the split surface 8a of the second housing portion 82. As a result, in the assembly direction, the length of the first portion 81a of the first housing portion 81 is larger than the length of the second housing portion 82, as compared with the case where the length of the first housing portion 81 to the second housing portion 81 is larger than the length of the second housing portion 82. When the body portion 82 is removed, a wider range of the control component 9 attached to the first housing portion 81 can be exposed. As a result, the replacement work of the control component 9 can be performed more easily.

Further, in the present embodiment, as described above, the upper portion of the housing portion 8 has a first wiring introduction port 812 that introduces the other end of the wiring whose one end is connected to the power supply inside the housing portion 8. A second wiring introduction port 82a for introducing the other end of the wiring whose one end is connected to the liquid level sensor 7 inside the housing portion 8 is provided. As a result, the power cable and the cable of the liquid level sensor 7 (207) can be introduced into the drive control module 102 (103) from the upper part of the housing portion 8, and the wiring with the control component 9 can be easily introduced. can.

Further, in the present embodiment, as described above, the control component 9 is arranged at the lower part of the housing portion 8 and the transformer 91 arranged at the lower part of the housing portion 8, and is arranged from the first wiring introduction port 812 to the housing. The wiring introduced inside the portion 8 includes at least an electromagnetic contactor 92 to which the wiring is connected from above. As a result, the transformer 91 and the magnetic contactor 92 are arranged in the lower part of the housing portion 8, so that a space for arranging the wiring connected to the transformer 91 and the electromagnetic contactor 92 is secured in the upper part of the housing portion 8. Can be done.

Further, in the present embodiment, as described above, the rod-shaped mounting member 7a to which the liquid level sensor 7 is mounted is further provided, and the first housing portion 81 and the second housing portion 82 are mounted respectively. The first holding portion 816 and the second holding portion 82c for holding the member 7a are provided, and the first holding portion 816 and the second holding portion 82c have the first housing portion 81 and the second housing portion 82 mutually. By being combined, it is configured to sandwich the mounting member 7a. Thereby, the mounting member 7a can be attached to the first housing portion 81 and the second housing portion 82 with a simple configuration. Further, in order to attach the mounting member 7a to the first housing portion 81 and the second housing portion 82, a configuration separate from the first housing portion 81 and the second housing portion 82 is provided in the first housing portion. The device configuration can be simplified as compared with the case of installing in the 81 and the second housing portion 82.

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

For example, in the above embodiment, an example in which a float switch is used as the liquid level sensor is shown, but the present invention is not limited to this. In the present invention, as the liquid level sensor, a liquid level sensor other than the float switch such as an electrode type sensor may be used.

Further, in the above embodiment, an example in which a submersible electric pump is configured by using a three-phase motor so as to be driven by electric power from a three-phase alternating current power source is shown, but the present invention is not limited to this. In the present invention, a submersible electric pump may be configured by using a single-phase motor so as to be driven by electric power from a single-phase power source. When using a single-phase motor, it is necessary to provide a capacitor.

Further, in the above embodiment, an example is shown in which a control component such as a transformer or an electromagnetic contactor is attached to the first housing portion, but the present invention is not limited to this. In the present invention, a control component such as a transformer or an electromagnetic contactor may be attached to the second housing portion.

Further, in the above embodiment, an example is shown in which the length of the first portion of the first housing portion is made smaller than the length of the second housing portion in the assembly direction, but the present invention is limited to this. do not have. In the present invention, the length of the first portion of the first housing portion may be larger than the length of the second housing portion in the assembly direction. Further, in the assembly direction, the length of the first portion of the first housing portion may be equal to the length of the second housing portion.

Further, in the above embodiment, an example is shown in which the dividing surface between the first housing portion and the second housing portion is configured to extend in the longitudinal direction of the submersible electric pump main body, but the present invention is not limited to this. do not have. In the present invention, the dividing surface may be configured to extend in the lateral direction (direction orthogonal to the rotation axis) of the submersible electric pump main body.

Further, in the above embodiment, an example is shown in which the housing portion is arranged so as to straddle both the head cover and the motor of the submersible electric pump body in the axial direction, but the present invention is not limited to this. In the present invention, the housing portion does not have to be arranged so as to straddle both the head cover of the submersible electric pump main body and the motor in the axial direction.

Further, in the above embodiment, an example in which the first portion of the first housing portion is formed in a box shape is shown, but the present invention is not limited to this. In the present invention, the first portion of the first housing portion may be formed into a shape other than the box shape such as a flat plate liquid.

Further, in the above embodiment, an example in which the second housing portion is formed in a box shape is shown, but the present invention is not limited to this. In the present invention, the second housing portion may be formed into a shape other than the box shape such as a flat plate liquid.

Further, in the above embodiment, an example is shown in which a configuration (first holding portion, second holding portion) for holding the mounting member is provided in both the first housing portion and the second housing portion. However, the present invention is not limited to this. In the present invention, the configuration for holding the mounting member may be provided only in one of the first housing portion and the second housing portion.

1 Motor 2 Rotating shaft 6 Head cover 7 Liquid level sensor 7a Mounting member 8 Housing part 8a Divided surface 9 Control parts 81 1st housing part 81a 1st part 81b 2nd part 82 2nd housing part 82a 2nd wiring introduction port 82c 2nd pinch 91 Transformer 92 Electromagnetic contactor 100, 200 Submersible electric pump 101 Submersible electric pump body 102, 103 Drive control module 810 Outer surface 811 Inner surface 812 1st wiring introduction port 816 1st pinch

Claims (9)

A housing that can be attached and detached to the head cover of the submersible electric pump body,
A liquid level sensor that detects the liquid level in the drainage area where the submersible electric pump body is installed, and
It is provided with a control component that is arranged inside the housing portion in a state of being connected to the liquid level sensor by wiring and controls the drive of the submersible electric pump body based on the detection signal of the liquid level sensor.
The housing portion includes a first housing portion and a second housing portion that are separably combined with each other, and the first housing portion is configured to be attached to the head cover.
Further, a rod-shaped mounting member extending in the vertical direction to which the liquid level sensor is mounted is provided.
The first housing portion and the second housing portion have a first holding portion and a second holding portion for holding the mounting member, respectively.
The first holding portion and the second holding portion are configured to hold the mounting member by combining the first housing portion and the second housing portion with each other. Drive control module for. By attaching to the non-automatic submersible electric pump main body, the liquid level sensor and the control component can drive and control the non-automatic submersible electric pump main body as an automatic type or an automatic alternating type. The drive control module for the submersible electric pump according to claim 1. Claim 1 Or the drive control module for the submersible electric pump according to 2. The drive control module for a submersible electric pump according to claim 3, wherein the housing portion is arranged so as to straddle both the head cover and the motor of the submersible electric pump main body in the axial direction. The first housing portion extends in the axial direction of the rotation axis of the submersible electric pump main body, extends in a direction substantially orthogonal to the axial direction of the first portion to which the control component is attached, and one end side thereof is underwater. The drive control module for a submersible electric pump according to any one of claims 1 to 4, wherein the electric pump main body side is connected to the first portion, and the other end side has a second portion attached to the head cover. The first portion of the first housing portion is arranged substantially parallel to the dividing surface between the first housing portion and the second housing portion, and has an outer surface facing the outer surface of the submersible electric pump main body. And, which is arranged substantially parallel to the divided surface, has an inner surface on the side opposite to the submersible electric pump main body side with respect to the outer surface, and a side on which the control component is mounted, and has a flat plate shape or a box shape. Formed in
The second housing portion is formed in a box shape attached to the first portion so as to cover the control component.
In the assembling direction of the first housing portion and the second housing portion at the divided surface, the length of the first portion of the first housing portion is larger than the length of the second housing portion. The drive control module for the submersible electric pump according to claim 5, which is also small. In the upper part of the housing portion, there is a first wiring introduction port for introducing the other end of the wiring whose one end is connected to the power supply inside the housing portion, and a wiring whose one end is connected to the liquid level sensor. The drive control module for a submersible electric pump according to any one of claims 1 to 6, which is provided with a second wiring introduction port whose end is introduced inside the housing portion. The control component is connected to a transformer arranged in the lower part of the housing portion and a wiring arranged in the lower part of the housing portion and introduced from the first wiring introduction port to the inside of the housing portion from above. The drive control module for a submersible electric pump according to claim 7, which includes at least an electromagnetic contactor. Submersible electric pump body and
A housing portion that can be detachably attached to the head cover of the submersible electric pump body,
A liquid level sensor that detects the liquid level in the drainage area where the submersible electric pump body is installed, and
It is provided with a control component that is arranged inside the housing portion in a state of being connected to the liquid level sensor by wiring and controls the drive of the submersible electric pump body based on the detection signal of the liquid level sensor.
The housing portion includes a first housing portion and a second housing portion that are separably combined with each other, and the first housing portion is configured to be attached to the head cover.
Further, a rod-shaped mounting member extending in the vertical direction to which the liquid level sensor is mounted is provided.
The first housing portion and the second housing portion have a first holding portion and a second holding portion for holding the mounting member, respectively.
The first holding portion and the second holding portion are configured to hold the mounting member by combining the first housing portion and the second housing portion with each other. ..

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