JP5685501B2 - Submersible pump control unit and submersible pump control panel - Google Patents

Description

  The present invention relates to a submersible pump control unit and a submersible pump control panel.

  6A and 6B show an example of the control panel 1 of the submersible pump. The control panel 1 is installed, for example, in the vicinity of a manhole in which a plurality of submersible pumps that convey sewage flowing from an upstream sewage pipe to a downstream sewage pipe are accommodated.

  The control panel 1 includes a control circuit 13 including a relay circuit and a sequencer circuit for driving the submersible pump based on the output of the water level meter installed in the manhole, and a terminal for connecting the power line and the submersible pump via the relay circuit. And a terminal block 14 on which a plurality of terminals including terminals for connecting the output line of the water level gauge and the control circuit are arranged, and a control panel housing 10 for housing them.

  At present, when a failure occurs in a part that constitutes such a control panel, it is restored by replacing it with a failed part unit. However, when a control method by the control circuit itself needs to be changed, a large scale is required. When refurbishment is required, it is necessary to replace individual parts and perform wiring corresponding to a new control method, which causes a problem that very complicated work is required.

  For this reason, when the control panel itself is newly manufactured and replaced with an existing control panel, the workability is improved, but not only the replacement work becomes large, but also the equipment cost of the control panel increases.

  Therefore, Patent Document 1 describes the existing load, power supply, and control signal in order to realize a housing unit capable of shortening the power failure time during work while ensuring reliability when renewing a high-pressure panel or the like. There has been proposed a housing unit that includes a new in-board device connected to a wire and a device storage frame for storing the new in-board device and is carried into an existing housing.

Utility Model Registration No. 3166213

  However, the high-pressure panel and the pull-in panel described in the above-mentioned literature are exclusively indoor facilities, and there is a problem that it is difficult to apply such a configuration immediately to the control panel of a submersible pump that is an outdoor facility. It was.

  In other words, it is exposed to high-temperature environments during the day on fine weather, and is exposed to high-humidity environments on rainy weather, making it difficult to avoid adverse environmental effects even if a new in-board device is simply housed in the existing enclosure. In addition, if the existing housing itself has deteriorated due to corrosion, etc., there is a possibility that part of the housing may be damaged when removing old parts installed in the existing housing. In some cases, rainwater may infiltrate from the damaged part, causing a short circuit accident or the like.

  The present invention has been made in view of the above-described conventional problems, and even when installed outdoors, where the influence of the temperature and humidity environment is large, the existing control panel equipment can be used effectively to update equipment. It is an object of the present invention to provide a submersible pump control unit and a submersible pump control panel that can reduce the required cost.

  To achieve the above object, a first characteristic configuration of a submersible pump control unit according to the present invention includes a terminal electrically connected to the submersible pump as described in claim 1 of the claims. A terminal block having a plurality of terminals, a switch circuit for switching an energization state to the submersible pump connected via the terminal block, an electronic circuit for controlling the switch circuit, and a unit housing for housing them. The unit housing is configured to form a gap with the support plate after removing the existing circuit components from the support plate provided in the existing control panel housing provided with a ventilation mechanism. In addition to providing a mounting portion for attaching the housing, openings are formed in the lower and upper edge portions, respectively.

  By removing the existing circuit components from the support plate provided on the existing control panel chassis and attaching the new control unit unit chassis to the support board, the control panel can be used while reusing the existing control panel chassis. Since it is updated, it becomes possible to effectively reduce work costs and equipment costs.

  The new control unit incorporates an electronic circuit that uses a semiconductor that controls the switch circuit instead of the conventional large relay circuit and sequencer. Although it can be easily accommodated in the housing, the electronic circuit and the DC power supply circuit to the electronic circuit are not only a heat source, but also exposed to extremely high temperatures in the summer, avoiding thermal runaway of the electronic circuit, etc. In order to do so, a cooling mechanism is required. In addition, when electronic circuit components are condensed in winter, there is a risk that a short circuit failure will occur.

  According to the above-described configuration, the gap formed between the unit casing and the support plate via the attachment portion is ventilated by the action of the ventilation mechanism provided in the existing control panel casing, and the air layer in the gap is formed. Acts as a heat insulation layer to block heat from the control cabinet, avoiding malfunction due to excessive heating of the electronic circuit in summer, and in the winter the air layer in the gap acts as a heat insulation layer due to condensation Short circuit accidents can be avoided. Further, since the airflow guided by the ventilation mechanism flows into the inside of the unit housing through the opening formed in the bottom, and after cooling the electronic circuit, it flows out from the opening formed in the upper edge of the side plate. Even if a cooling mechanism such as the above is not provided, the control unit can be effectively cooled.

  In addition to the first feature configuration described above, the second casing is formed in an inclined posture in which the top plate is tilted downward from the front side to the back side. The opening of the upper edge portion is formed between the side end portion of the top plate and the side plate.

  If the existing control cabinet is damaged by corrosion or the like, water droplets may enter the control cabinet at the time of rainfall. Even in such a case, the water droplets dropped on the upper part of the unit housing flow down to the back side without entering the inside of the unit housing by the inclined top plate inclined downward from the front surface to the back surface. It is possible to avoid a failure such as a short circuit due to flooding of the unit housing itself. In addition, since an opening is formed between the side edge of the tilted top plate and the upper edge of the side plate, there is no need to machine the side plate to form the opening, and the temperature rises by absorbing heat from the electronic circuit. It is possible to effectively flow out the air from the uppermost opening.

  In the third feature configuration, as described in claim 3, in addition to the first or second feature configuration described above, a door body having an operation unit on a front surface is attached to the unit housing, and the door A housing part for housing the electronic circuit is formed on the back side of the body, an opening is formed on the upper edge side of the wall surface defining the housing part, and an opening is formed in the lower part of the wall surface.

  If the door of the existing control panel is opened during maintenance inspection of the control panel, the operation unit provided on the surface of the door of the control unit can be operated, and the inspection work can be performed easily. In addition, since the electronic circuit is accommodated in the rear side accommodating portion of the door body, it is not necessary to route a long wiring in order to input an operation signal via the operation portion to the electronic circuit, so that the cost of parts can be reduced accordingly. Reliability can be improved. Furthermore, since the cooling air passage is formed from the opening formed in the lower portion of the wall surface defining the housing portion to the opening formed on the upper edge side of the wall surface, the heat source such as an electronic circuit can be effectively used. Can be cooled.

  In the fourth feature configuration, as described in claim 4, in addition to any of the first to third feature configurations described above, an air path inside the control panel housing formed by the ventilation mechanism is provided. The opening position of the unit housing is set so that the air passages connecting the openings formed in the lower and upper edge portions of the unit housing overlap.

  Wind flow by the existing ventilation mechanism is overlapped by overlapping the air passage by the ventilation mechanism installed in the chassis of the existing control panel and the air path connecting the lower part of the unit chassis and the opening formed in the upper edge of the side plate. The control unit can be cooled to the maximum.

  The first characteristic configuration of the control panel of the submersible pump according to the present invention is formed by removing the existing components from the support plate provided in the existing control panel housing provided with the ventilation mechanism, as described in claim 5. A submersible pump control unit having any one of the first to fourth characteristic configurations described above, an air path inside the control panel housing formed by the ventilation mechanism, a lower portion of the unit housing, It exists in the point accommodated in the position where the air path which connects the opening formed in the upper edge part overlaps.

  Similarly, by overlapping the air path by the ventilation mechanism installed in the casing of the existing control panel and the air path connecting the opening formed in the lower part of the unit casing and the upper edge of the side plate, the existing ventilation mechanism It is possible to realize a submersible pump control panel that can cool the control unit using the wind flow to the maximum.

  A second characteristic configuration of the control panel of the submersible pump according to the present invention is any one of the first to fourth aspects described above on the support plate provided in the control panel housing provided with the ventilation mechanism. The control unit of the submersible pump having the characteristic configuration described above has an overlap between the air path inside the control panel housing formed by the ventilation mechanism and the air passage connecting the openings formed in the lower and upper edge portions of the unit housing. It is in the point where it is accommodated in the position.

  Even if it is impossible to divert the existing control panel chassis, such as when the existing control panel chassis is aging and rain leakage is severe, or when the support plate cannot support the weight of the unit, There is no need to manufacture the entire control panel from scratch, and it is possible to easily repair and update the control panel by newly manufacturing only the control panel housing that can accommodate the control unit described above and storing the control unit. Manufacturing cost and working time can be reduced. In addition, if the control unit described above is commercialized as a standard control unit, when an order for a new control panel is received, it is possible to produce only a control panel housing and incorporate a standard control unit into it. Since it becomes a control panel, the control panel can be delivered quickly.

  As described above, according to the present invention, even when installed outdoors where the influence of the temperature and humidity environment is large, the cost required for the renewal equipment can be reduced by effectively utilizing the existing control panel equipment. A submersible pump control unit and a submersible pump control panel can be provided.

(A) is a side view of a control panel and a control unit of a submersible pump according to the present invention, and (b) is a front view of the same. (A) is a sectional side view of the control panel of the submersible pump according to the present invention, (b) is a sectional view taken along line AA of (a). Perspective view of essential parts of submersible pump control unit Perspective view of the submersible pump control unit with the door open (A) is a side view of an existing submersible pump control panel, and (b) is a front view of the same. (A) is a sectional side view of a control panel of an existing submersible pump, (b) is a front view of a state in which a door body is opened. Schematic circuit diagram of submersible pump control unit

  The submersible pump control unit and submersible pump control panel according to the present invention will be described below. FIGS. 5A and 5B show the appearance of the control panel 1 of an existing submersible pump installed in the field. The control panel 1 is installed in the vicinity of a manhole in which a plurality of submersible pumps for conveying the sewage flowing from the upstream sewage pipe to the downstream sewage pipe is accommodated, and is submerged based on the level of the sewage stored in the manhole. A control circuit for driving and controlling the pump is accommodated.

  As shown in FIGS. 6A and 6B, the existing control panel 1 includes a control panel housing 10 having a door 11 that can be freely opened and closed, and a support plate attached to the inner back side of the control panel housing 10. 12, a control circuit 13 and a terminal block 14 mounted on the support plate 12, an operation unit 16 in which indicators such as operation switches and meters are installed, a communication device that transmits the state of the submersible pump to the outside, and the like The inside door body 15 provided with is provided. Reference numeral 11 a in FIG. 5B is a transparent glass window formed in the door body 11.

  A plurality of slits 17 are formed as intake openings at the lower part of one side wall of the control panel 1 (see FIG. 6A), and a plurality of slits 18 are formed as exhaust openings at the upper part of the other side wall. In addition, an exhaust fan 19 is attached to the inside of the slit 18 (see FIG. 5A). That is, the slits 17 and 18 and the exhaust fan 19 constitute a ventilation mechanism.

  A three-phase 200V power line supplied from a commercial power source is connected to the control circuit 13 via the input terminal of the terminal block 14 installed at the lower part of the control circuit 13, and the control circuit 13 is also controlled via the output terminal of the terminal block 14. The circuit 13 and two submersible pumps P serving as loads are connected. Further, the output line LS of the water level meter installed in the manhole and the control circuit 13 including the water level converter are connected via the signal terminal of the terminal block 14. Similarly, the control circuit 13 is connected via the control terminal of the terminal block 14. To the exhaust fan 19 and a heater (not shown) for preventing condensation.

  A plurality of support bolts B are welded to the back wall portion of the control cabinet 10 and mounting holes H formed in the support plate 12 are fitted into the support bolts B via spacers, and further fixed with nuts. ing. Based on the output of the water level gauge, the control circuit 13 drives one of the submersible pumps when the water level in the manhole reaches a predetermined operating water level, and stops the submersible pump when it reaches a predetermined stop water level. The plurality of circuit components are connected to the support plate 12 by screws and the respective circuit components are connected so that the predetermined control is performed. That is, the control circuit 13 is a control sequence control circuit in which individual relay circuits and the like are connected. The support plate 12 is usually configured separately from the plate constituting the control panel housing 10, but the support plate 12 may be used integrally with the plate constituting the control panel housing.

  When there is a significant change in the control method of the manhole pump by the control panel 1 or when the control circuit 13 or the like needs to be significantly replaced due to the life of the circuit parts inside the control panel 1 or the like The control unit according to the present invention is not replaced with a new control panel, but replaced with the individual parts accommodated in the existing control panel 1 instead of replacing the parts and reconnecting. Is housed inside the existing control panel housing 10.

  In such a case, the inner door 15 is removed from the control panel housing 10 shown in FIG. 6B, and the existing circuit components (the control circuit 13, the terminal block 14, etc.) are further removed from the support plate 12. Later, a new control unit is accommodated in the space formed therein.

  In FIG. 1 to FIG. 4, the unit housing 21 of the new control unit 20 is supported via the mounting portion 25 so as to be located in the middle of the slits 17 and 18 in the height direction of the existing control panel housing 10. The state attached to the board 12 is shown.

  As shown in FIG. 3, the attachment portion 25 is formed of a sheet metal having a U-shaped cross section welded or bolted to the back side of the unit housing 21, and an ear portion is provided at the upper and lower positions of the left and right edges of the sheet metal. 25a is extended and formed. In addition, the formation position of the ear | edge part 25a is not restricted to the up-and-down position of the right-and-left edge of a sheet metal, You may form in the intermediate position and may be formed in the left-right position of an upper-lower-end edge.

  A screw hole is opened in a portion of the support plate 12 corresponding to the ear portion 25a, and is bolted from an attachment hole formed in the ear portion 25a. As a result, the unit housing 21 is attached so that a gap is formed between the back surface of the unit housing 21 and the support plate 12. In addition, the attachment part 25 and the back surface of the unit housing | casing 21 may be integrally formed by one component.

  As shown in FIG. 4, the unit housing 21 includes a terminal block 22 including a plurality of terminals including terminals that are electrically connected to the submersible pump, and an energized state of the submersible pump connected via the terminal block 22. A switch circuit 23 such as an electromagnetic switch for switching between and a breaker for interrupting overcurrent, a microcomputer for controlling the switch circuit 23, and an electronic circuit 24 including peripheral circuits thereof are housed.

  Instead of the control circuit 13 in which individual components such as a relay circuit used in the existing control panel 1 are connected, the control circuit is constructed by a semiconductor circuit such as a microcomputer, thereby reducing the size of the circuit. . The microcomputer also functions as a control unit of a transmitter that transmits the operating state of the pump and the presence / absence of an abnormality to the outside. The transmitter is also incorporated in the unit housing 21.

  The top plate 21a of the unit housing 21 is formed in an inclined posture that inclines downward from the front to the back, and a first opening h1 is formed between the side end of the top plate 21a and the upper edge of the left and right side plates 21b. In addition, second and third openings h2 and h3 are formed in the left and right side plates 21b.

  When the existing control panel housing 10 is damaged by corrosion or the like, water droplets may infiltrate during rain, but the water droplets dropped on the upper portion of the unit housing 21 are inclined downward from the front to the back. The top plate 21a in the inclined posture flows into the gap between the upper and lower support plates 12 with the upper and lower portions opened without entering the inside of the unit housing 21. Therefore, even if the existing control panel housing 10 that has been deteriorated to some extent is reused, it is possible to prevent an unfavorable situation in which the unit housing 21 itself is submerged and a failure such as a short circuit occurs.

  In this case, it is preferable to form a drain hole 29 for draining rainwater accumulated in the existing control cabinet 10 at the bottom of the control cabinet 10 during installation of the unit cabinet 21.

  Second and third openings h2 and h3 are formed in the side plate 21b of the unit housing 21, but the first opening h1 is at least between the side end of the top plate 21a and the upper edge of the left and right side plates 21b. Is not necessarily formed, the second and third openings h2 and h3 are not necessarily formed. The opening h1 between the side end of the inclined top plate 21a and the upper edge of the side plate 21b can be naturally formed by simply placing the top plate 21a at an angle without machining the side plate 21b. Thus, the air whose temperature has increased due to heat absorption can be effectively discharged from the uppermost opening h1. The example in which the opening h1 is formed at the uppermost end of the side plate has been described. However, the opening h1 may be formed at the upper edge portion slightly lower than the uppermost end, and is not limited to the side plate, and the upper edge portion of the door body 26 described above. It may be formed.

  In order to prevent rainwater from entering the unit housing 21, it is preferable that the side end portion of the top plate 21a protrudes from the upper edge portions of the left and right side plates 21b. However, as shown in FIG. If the side edge and the upper edge of the left and right side plates 21b are substantially flush with each other, the groove rubber 30 is provided on the side edge of the top plate 21a that forms the first opening h1 and the upper edge of the left and right side plates 21b. It is preferable to attach. This is because rainwater dripped onto the top plate 21a can be effectively prevented from entering the inside through the opening h1.

  The unit housing 21 is provided with a door body 26 having an operation unit 16 on the front surface, and an electronic circuit 24 on the back side of the door body 26 and a housing part 27 for housing a power supply circuit for supplying DC power to the electronic circuit 24. A plurality of slits 27a are formed on the upper edge side of the wall surface that is formed and partitions the accommodating portion 27, and an opening h4 is formed at the bottom of the wall surface. An opening h5 is also formed in the bottom portion 28 of the unit housing 21. In the present embodiment, an example in which the openings h4 and h5 are respectively formed on the bottom surface has been described. However, the opening may be formed on a side plate or the like as long as it is below the unit housing 21 including the bottom surface.

  The door body 26 is provided with an ammeter for monitoring the operating state of the submersible pump, a switch for forcibly driving the submersible pump, and the like. In addition, an LED lamp that illuminates the operation unit at night is attached to the center upper portion of the door body 26 so as to protrude from the surface of the door body 26 to the near side.

  A wind connecting the air path (indicated by the one-dot chain line arrow in FIG. 1B) formed in the control panel housing 10 by the ventilation mechanism and the opening h1 formed at the bottom of the unit housing 21 and the upper edge of the side plate 21b. The position of the bottom opening h5 and the position of the upper opening h1 of the unit housing 21 are set so that the roads overlap.

  Accordingly, the outside air sucked into the control panel housing 10 from the slit 17 by the exhaust fan 19 flows into the unit housing 21 and the door body 26 through the opening h5 in the bottom 28 of the unit housing 21, and the electronic circuit 24. After the power supply circuit is cooled, the air is exhausted from the first opening h1, the second and third openings h2, h3, and the slit 18 of the control panel housing 10, and the electronic circuit and the like are effectively cooled.

  As described above, according to the above-described configuration, the function of the ventilation mechanism provided in the existing control panel housing 10 is provided in the gap formed between the unit housing 21 and the support plate 12 via the mounting portion 25. The air layer in the gap acts as a heat insulation layer to shut off the heat from the control cabinet, and malfunctions due to excessive temperature rise of the electronic circuit can be avoided in the summer. The air layer acts as a heat insulating layer, and a short circuit accident due to condensation can be avoided. Moreover, the short circuit accident by dew condensation is also avoided by controlling the heater by the electronic circuit 24.

  In addition, as shown in FIG. 3, if it forms in the duct shape which opened the upper and lower sides of the said gap | interval, and was provided with the partition wall on either side, it can raise a ventilation speed, improve a heat transfer rate, and can improve a cooling effect more. It becomes possible.

  Furthermore, since the airflow guided by the ventilation mechanism flows into the inside through the opening formed in the bottom of the unit housing 21 and cools the electronic circuit, it flows out from the opening formed in the upper edge of the side plate. Even if the control unit 20 is not provided with a cooling mechanism such as a fan, the control unit can be effectively cooled.

  If the door 11 of the existing control panel is opened during maintenance inspection of the control panel 1, the operation unit provided on the door body surface of the control unit 20 can be operated, and the inspection work can be easily performed. In addition, since the electronic circuit is accommodated in the rear side accommodating portion of the door body, it is not necessary to route a long wiring in order to input an operation signal via the operation portion to the electronic circuit, so that the cost of parts can be reduced accordingly. Reliability can be improved. In addition, a cooling air passage is formed from the opening formed at the bottom of the wall surface defining the housing portion to a plurality of slits formed on the upper edge side of the wall surface. Can be cooled.

  The lower opening h5 of the unit housing 21 is formed wide as in the above-described embodiment, and may be shared as an opening through which ventilation and wiring pass, or a hole for wiring may be used as an opening for ventilation or for wiring. You may provide separately from this hole.

Based on FIG. 7, the circuit configuration of the above-described control unit 20 will be briefly described.
The AC 200V three-phase alternating current supplied from the commercial power source is branched and connected to the two system leakage breakers 31 and 32 via the main breaker 30 and to the control power breaker 33. Reference numerals 47 and 48 are lightning arresters (arresters).

  Electromagnetic switches 34 and 35 serving as the switch circuit 23 are connected to the induction motors M1 and M2 of the submersible pump via the earth leakage breakers 31 and 32. Between phase leakage breakers 31 and 32 and induction motors M1 and M2, phase advance capacitors C1 and C2, overload detection circuits 36 and 37, and current transformers 38 and 39 are interposed.

  On the other hand, AC100V single-phase alternating current supplied from a commercial power source is connected to relay circuits 41, 42, and 43 via a breaker 40, and the heater 44, cooling fan 45, Patlite (registered trademark) 46, and the like are controlled on or off. .

  An AC / DC converter 47 is connected to the control power breaker 33, and a predetermined DC voltage is applied to an electronic circuit 24 such as a microcomputer. The electronic circuit 24 controls the electromagnetic switches 34 and 35 to operate the submersible pump based on a preset control program, and controls the relay circuits 41, 42, and 43 to control the heater 44 and the cooling fan 45. , Patrite (registered trademark) 46 is driven. Although not described in detail, the electronic circuit 24 receives an output of a water level sensor that detects the stored water level of the manhole, an output of a temperature sensor that detects the environmental temperature of the control unit 20, and the like. The electromagnetic switches 34 and 35 and the relay circuits 41 and 42 are controlled.

  The above-mentioned functional breakers 31, 32, 33, electromagnetic switches 34, 35, lightning arresters 47, 48, phase advance capacitors C 1, C 2, etc. are accommodated in the unit housing 21 as the switch circuit 23. Further, the above-described AC / DC converter 47 and electronic circuit 24 such as a microcomputer are accommodated in the door body 26.

  In the above-described embodiment, the case where the existing control panel casing is reused has been described. However, the case of the existing control panel casing is aging, and when the rain leakage is severe or the support plate supports the weight of the unit. When it is found that the existing control panel casing cannot be used, such as when there is no such case, a new control panel casing may be manufactured and the control unit described above may be accommodated therein.

  In other words, if a new control panel chassis having a structure substantially equivalent to the existing control panel chassis, that is, a control panel chassis having a ventilation mechanism is manufactured, the above-described underwater is attached to the support plate provided in the control panel chassis. If the pump control unit is housed in a position where the air passage inside the control panel housing formed by the ventilation mechanism and the air passage connecting the opening formed in the lower and upper edges of the unit housing overlap, a new underwater A pump control panel can be constructed.

  In this case, it is not necessary to manufacture the entire control panel with a predetermined function from scratch. A new control panel can be constructed by manufacturing only the casing of the control panel and accommodating the control unit inside it. It is possible to reduce the work cost and work time for repairing and updating the panel.

  In addition, if the existing control panel that was being reused when the control panel was renewed has been damaged over time, the control unit that was used to manufacture only the new control panel housing It becomes possible to repair the control panel very easily by accommodating.

  As mentioned above, the control unit and the control panel of the submersible pump according to the present invention have been described taking the manhole facility as an example. However, the present invention is not limited to the one used in the manhole facility, but is a rainwater drainage pump facility installed in a regulating pond or the like, a cold region It can be applied to various submersible pump control units and control panels, such as water spray pump equipment for melting snow and water intake pump equipment from wells.

  The above-described submersible pump control unit and control panel are merely specific examples, and the scope of the present invention is not limited by the description. For example, the specific circuit configuration of the control unit, the dimensions of various structures, and the like. The material, configuration, and the like can be appropriately changed and designed within the scope of the effects of the present invention.

1: Submersible pump control panel 10: Control panel housings 17, 18, 19: Ventilation mechanism 20: Submersible pump control unit 21: Unit housing 22: Terminal block 23: Switch circuit 24: Electronic circuit

Claims (6)

A terminal block having a plurality of terminals including a terminal electrically connected to the submersible pump, a switch circuit for switching a power supply state to the submersible pump connected via the terminal block, and an electronic device for controlling the switch circuit Comprising a circuit and a unit housing for housing them,
The unit housing is a mounting portion for attaching the unit housing so as to form a gap between the support plate after removing existing circuit components from the support plate provided in the existing control panel housing provided with a ventilation mechanism. And a submersible pump control unit in which openings are formed in the lower and upper edges, respectively.   The said unit housing is formed in the inclination attitude | position which a top plate inclines below from the front to the back, and the opening of the said upper edge part is formed between the side edge part of the said top plate, and a side plate. Submersible pump control unit.   A door body having an operation part on the front is attached to the unit housing, a housing part for housing the electronic circuit is formed on the back side of the door body, and an opening is formed on the upper edge side of the wall surface defining the housing part. The submersible pump control unit according to claim 1 or 2, wherein an opening is formed at a lower portion of the wall surface.   The opening position of the unit casing is set so that the air path inside the control panel casing formed by the ventilation mechanism and the air path connecting the openings formed in the lower and upper edge portions of the unit casing overlap. The submersible pump control unit according to any one of claims 1 to 3.   The submersible pump control unit according to any one of claims 1 to 4 is provided in a space formed by removing existing components from a support plate provided in an existing control panel housing having a ventilation mechanism. A submersible pump control panel accommodated at a position where an air path connecting the opening formed in the lower and upper edge portions of the unit casing overlaps with the air path inside the control panel casing formed by a mechanism.   A submersible pump control unit according to any one of claims 1 to 4 is provided on a support plate provided in a control panel housing having a ventilation mechanism, and an air path inside the control panel housing formed by the ventilation mechanism. The control panel of the submersible pump accommodated in a position where the air passages connecting the openings formed in the lower and upper edge portions of the unit housing overlap.

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