JP2020051358A - Control board and water supply device - Google Patents

Abstract

To provide a control board which can cool an electrical component disposed within a control board without providing a fan within the control board.SOLUTION: A control board 10 has a ventilation hole 200 through which air flowing by rotation of a cooling fan 25 fixed to a drive shaft 11 of an electric motor assembly 30 can pass. The ventilation hole 200 is formed in a face opposite to the electric motor assembly 30 of the control board 10.SELECTED DRAWING: Figure 10

Description

  TECHNICAL FIELD The present invention relates to a control panel and a water supply device.

  2. Description of the Related Art A control panel that houses electric components is known (for example, see Patent Document 4).

JP 2005-57934 A JP 2007-211695 A JP 2007-224885 A JP-A-2005-95967

  However, when the electric components are arranged in the control panel, the electric components may be broken if the temperature inside the control panel becomes high. Further, the operation of the water supply device may be stopped due to the failure of the electric component.

  A configuration in which a fan for cooling electric components is arranged inside the control panel is conceivable.However, from the viewpoint of reducing the overall cost of the water supply device and reducing the size of the control panel, without providing a fan in the control panel, It is desirable to cool the electrical components in the control panel.

  Therefore, an object of the present invention is to provide a control panel capable of cooling electric components disposed in the control panel without providing a fan in the control panel. An object of the present invention is to provide a water supply device provided with a control panel capable of cooling electric components disposed in the control panel without providing a fan in the control panel.

  One embodiment is a control panel in which electric components are arranged, the control panel having a ventilation hole through which air flowing by rotation of a cooling fan fixed to a drive shaft of the motor assembly can pass. The vent is formed on a surface of the control panel facing the electric motor assembly.

In one aspect, the control panel can be supported by the gantry so that the ventilation hole is adjacent to a slit formed in a gantry supporting the control panel when the control panel is viewed from above. Features.
In one aspect, the control panel is capable of being supported on the gantry via a spacer that forms a gap between the control panel and the gantry.
In one aspect, the ventilation hole extends along a flow direction of air formed by the cooling fan.
In one aspect, the control panel includes a guide portion connected to the ventilation hole and inclined with respect to a direction perpendicular to an axial direction of the drive shaft.

  In one aspect, a pump, a motor assembly for driving the pump, a cooling fan fixed to a drive shaft of the motor assembly, an electric component disposed inside, and air flowing by rotation of the cooling fan are provided. A control panel having an air hole that can pass therethrough, wherein the air hole is formed on a surface of the control panel facing the electric motor assembly.

In one embodiment, the water supply device further includes a gantry for supporting the control panel, wherein the gantry has a slit, and the control panel has the ventilation hole when the control panel is viewed from above. Is supported by the gantry so as to be adjacent to the slit.
In one aspect, the water supply device further includes a spacer disposed between the control panel and the gantry and forming a gap between the control panel and the gantry.
In one aspect, the ventilation hole extends along a flow direction of air formed by the cooling fan.
In one aspect, the control panel includes a guide portion connected to the ventilation hole and inclined with respect to a direction perpendicular to an axial direction of the drive shaft.

  Since the control panel has a vent formed on the surface facing the motor assembly, air sent by the cooling fan is sent into the control panel through the vent. Therefore, the electric components arranged in the control panel can be cooled without providing a fan inside the control panel.

It is a top view of one Embodiment of a water supply apparatus. It is a side view of the water supply apparatus shown in FIG. It is a figure showing the structure of a motor assembly. It is a perspective view showing one embodiment of a control board. It is a perspective view which shows the component of a control panel. FIG. 5 is a perspective view of the case cover when the case cover is viewed from a direction (opposite direction) different from the direction shown in FIG. 4. It is a top view of a case main body. FIG. 4 is a diagram illustrating a positional relationship between a bottom plate of a case main body and an assembly casing of the electric motor assembly. FIG. 4 is a diagram illustrating a positional relationship between a bottom plate of a case main body and an assembly casing of the electric motor assembly. It is a figure showing the flow of the air formed by the cooling fan. It is a figure showing a guide part connected to a vent. It is a figure showing other embodiments of a vent. It is a figure showing a water supply device provided with other embodiments of a support member. It is a figure showing a water supply device provided with other embodiments of a support member. It is a figure showing the slit formed in the gantry. It is a figure which shows one Embodiment of the positional relationship of the ventilation hole formed in the bottom plate of the case main body, and the slit formed in the gantry. It is a figure which shows the spacer arrange | positioned between the opposing surface (bottom plate) of a control panel and a gantry. It is a figure which shows the other embodiment of the positional relationship of the ventilation hole formed in the bottom plate of the case main body, and the slit formed in the gantry. FIG. 19 is a vertical sectional view of the case main body and the gantry shown in FIG. 18.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings described below, the same or corresponding components are denoted by the same reference numerals, and redundant description will be omitted. In a plurality of embodiments described below, the configuration of one embodiment, which is not particularly described, is the same as that of the other embodiments, and thus redundant description will be omitted.

  FIG. 1 is a plan view of one embodiment of the water supply device 1. FIG. 2 is a side view of the water supply device 1 shown in FIG. As shown in FIGS. 1 and 2, the water supply device 1 includes a pump 2, a motor 3 for driving the pump 2, a motor casing 4 in which the motor 3 is disposed, and an inverter serving as a variable speed means for the motor 3. 5, an inverter case 6 in which the inverter 5 is disposed and detachably attached to the motor casing 4, a control panel 10 in which a control unit (control board) 9 for controlling the pump 2 is stored, and a motor 3. The inverter case 6 is attached to the motor casing 4 along the direction of the axis CL of the drive shaft 11 rotated by the drive shaft 11 and is provided at a position accessible from the outside. The motor 3 and the inverter 5 constitute a motor assembly 30.

  In the present embodiment, the pump 2 is a direct-acting horizontal shaft pump in which a single drive shaft 11 is shared by the motor 3 and the pump 2. The pump 2 includes an impeller 20 fixed to an end of the drive shaft 11 (that is, a load side of the drive shaft 11), and a pump casing 21 that houses the impeller 20. The drive shaft 11 is rotated by the motor 3, and the impeller 20 rotates integrally with the drive shaft 11 in the pump casing 21. The motor casing 4 is fixed to the pump casing 21. A suction pipe 22 is connected to a suction port 21 a of the pump casing 21, and a discharge pipe 23 is connected to a discharge port 21 b of the pump casing 21.

  When the impeller 20 rotates, the liquid is sucked into the pump casing 21 through the suction pipe 22. Velocity energy is given to the liquid by rotation of the impeller 20, and the velocity energy is converted into pressure energy by passing the liquid through a volute chamber in the pump casing 21, so that the liquid is pressurized. The pressurized liquid is transferred to the outside through the discharge pipe 23.

  The arrangement of the components of the water supply device 1 will be described. As shown in FIGS. 1 and 2, the water supply apparatus 1 further includes a pump 60, a motor casing 4, and a base 60 on which the control panel 10 is mounted. The pump casing 21 is supported by a pump table 61 fixed to the base 60, and the motor casing 4 is supported by a motor table 62 fixed to the base 60.

  The control panel 10 is arranged around at least one of the inverter case 6 and the motor casing 4 so that the mounting structure 15 can be exposed. In other words, the control panel 10 is not disposed around the mounting structure 15 but is separated from the mounting structure 15. The mounting structure 15 is arranged so that a worker can visually recognize the mounting structure 15 from outside.

  In one embodiment, the control panel 10 may be located above at least one of the pump 2 and the motor assembly 30. With such an arrangement, it is not necessary to provide a space for mounting the control panel 10 on the base 60, so that the size of the base 60 can be reduced. As a result, the overall size of the water supply device 1 can be reduced. In other embodiments, the control panel 10 may be located beside at least one of the pump 2 and the motor assembly 30.

  In the present embodiment, the control panel 10 is fixed to the base 60, supported by a support member 65 extending upward from the surface of the base 60, and disposed above the motor casing 4. An operation panel 12 is provided on the control panel 10, and the operation panel 12 is arranged at a position higher than the motor casing 4 in order to improve operability by an operator.

  The inverter case 6 is attached to the motor casing 4 by an attachment structure 15 so as to protrude from the motor casing 4, and is arranged above the base 60. That is, the inverter case 6 is not directly fixed to the base 60. Since the inverter case 6 is fixed to the motor casing 4, the operator can easily perform the replacement work of the inverter 5.

  In the present embodiment, as shown in FIG. 1, the pump 2, the motor casing 4, the control panel 10, the inverter case 6, and the mounting structure 15 are provided inside the outer edge 60 a of the base 60 when the base 60 is viewed from above. Are located.

  The structure of the motor assembly 30 including the motor 3 and the inverter 5 will be described. FIG. 3 is a diagram illustrating the structure of the motor assembly 30. As shown in FIG. 3, the motor assembly 30 includes a motor (rotating element) 3 including a drive shaft 11, a rotor (rotor) 31 for rotating the drive shaft 11 and a stator (stator) 32, and a rotor 31. And a motor casing 4 that houses the stator 32, an inverter 5 that is arranged adjacent to the rotor 31 and the stator 32 and controls the operation (rotational speed) of the motor 3, and a drive shaft 11 that houses the inverter 5 and And an inverter case 6 arranged in series with the motor casing 4 along the axis CL direction. The motor casing 4 and the inverter case 6 constitute an assembly casing 55 of the motor assembly 30.

  The drive shaft 11 extends through the motor casing 4 and the inverter case 6, and the motor casing 4 and the inverter case 6 are arranged concentrically with the drive shaft 11. In the present embodiment, since the motor casing 4 and the inverter case 6 are arranged in series in the direction of the axis CL of the drive shaft 11, the motor assembly 30 can have a compact structure. A cooling fan 25 arranged concentrically with the drive shaft 11 is fixed to an end of the drive shaft 11 (that is, the non-load side of the drive shaft 11). The cooling fan 25 is arranged outside the inverter case 6 and is adjacent to the inverter case 6. In one embodiment, cooling fan 25 is a centrifugal fan.

  The motor 3 which is a heat source is arranged inside the motor casing 4. The motor 3 includes a rotor 31 fixed to the drive shaft 11, and a stator (stator) that surrounds the rotor 31 and receives electric power from the outside (not shown) by a winding (coil) 32 b to form a rotating magnetic field. ) 32. The stator 32 includes a stator core 32a and a plurality of windings 32b wound around the stator core 32a. The rotor 31 is rotated by a rotating magnetic field formed between the rotor 31 and the stator 32, and the drive shaft 11 to which the rotor 31 is fixed rotates together with the rotor 31.

  In FIG. 3, the motor 3 is schematically illustrated. The motor 3 is, for example, a permanent magnet motor using a permanent magnet for a rotor. However, the motor 3 is not limited to a permanent magnet motor, and may be various types of motors such as an induction motor and an SR motor.

  The motor casing 4 includes a motor frame 40 to which the stator 32 is fixed, an end cover 42 that closes one open end of the motor frame 40 and has a through hole 35 through which the drive shaft 11 passes, and a motor frame 40. And a motor side plate (bracket) 43 in which the other opening end is closed and a through-hole 33 through which the drive shaft 11 penetrates is formed. The end cover 42 and the motor side plate 43 face each other with the motor 3 interposed therebetween. The drive shaft 11 is rotatably supported by a bearing 37 supported by a bearing support 36 of the end cover 42 and a bearing 39 supported by a bearing support 38 of the motor side plate 43.

  On the outer surface of the motor frame 40, a plurality of fins 58 extending in the direction of the axis CL of the drive shaft 11 are arranged. These fins 58 extend outward from the outer surface of the motor frame 40 and are arranged at equal intervals along the circumferential direction of the motor frame 40.

  The inverter case 6 includes an inverter frame 45 arranged around the inverter 5, in other words, an inverter frame 45 disposed around the inverter 5, and a cover member 46 for closing an open end of the inverter frame 45. The inverter frame 45 is arranged adjacent to the motor side plate 43 and is connected to the motor side plate 43.

  On the outer surface of the inverter frame 45, a plurality of fins 56 extending in the direction of the axis CL of the drive shaft 11 are arranged. These fins 56 extend outward from the outer surface of the inverter frame 45 and are arranged at equal intervals along the circumferential direction of the inverter frame 45.

  In the present embodiment, the mounting structure 15 is a through bolt extending parallel to the direction of the axis CL of the drive shaft 11. The mounting structure 15 is inserted into the cover member 46, the motor side plate 43, and the motor frame 40. The mounting structure 15 can fasten the cover member 46, the inverter frame 45, the motor side plate 43, and the motor frame 40 by pressing the cover member 46 against the inverter frame 45 with its head.

  The motor assembly 30 includes an inverter case 6, more specifically, a fan cover 51 connected to the cover member 46 so as to cover the cooling fan 25. The fan cover 51 is a member for sending cooling air to the inverter case 6 and the motor casing 4 in this order while preventing contact of a human finger with the cooling fan 25. The fan cover 51 is disposed so as to cover the cover member 46, and is fixed to the cover member 46. The fan cover 51 has an opening 51a formed on the surface of the fan cover 51 facing the cooling fan 25.

  The inverter 5 is arranged inside the inverter case 6. The inverter 5 includes an inverter element 47 including elements such as a switching element and a capacitor, and an inverter board 48 on which the inverter element 47 is mounted. The inverter board 48 is fixed to the inner surface of the cover member 46.

  The motor assembly 30 further includes a shaft cover 50 that covers the periphery of the drive shaft 11. The shaft cover 50 is a separating member that separates the drive shaft 11 from the inverter 5. The shaft cover 50 has a cylindrical shape, and is arranged concentrically with the drive shaft 11. The shape of the shaft cover 50 is not particularly limited. The shaft cover 50 extends in the direction of the axis CL of the drive shaft 11. The inverter 5 (that is, the inverter element 47 and the inverter board 48) and a connection line (not shown) for electrically connecting the inverter 5 and the winding 32b of the stator 32 are arranged outside the shaft cover 50.

  The inverter board 48 has an annular shape through which the drive shaft 11 and the shaft cover 50 penetrate, and the inverter board 48 and the shaft cover 50 are arranged concentrically with the drive shaft 11. By providing the shaft cover 50, it is possible to prevent the connection wire from being wound around the drive shaft 11 and to prevent the inverter element 47 from contacting the drive shaft 11. As a result, the failure of the inverter 5 can be reliably prevented.

  The control panel 10 according to the present embodiment will be described. FIG. 4 is a perspective view showing one embodiment of the control panel 10. FIG. 5 is a perspective view showing components of the control panel 10.

  The control panel 10 has a box-shaped structure, and the control panel 10 houses a control unit 9 (control board 9). The control board 9 is arranged to face the side of the control panel 10. The control board 9 includes an input / output unit for inputting a discharge pressure, an inflow pressure, and the like, a communication unit connected to communication with the inverter 5, a memory storing various programs, a CPU for performing arithmetic control operations, and the like. Information such as the start / stop of the pump 2, the rotation frequency, the trip of the inverter 5, and the like is transmitted and received. The control board 9 executes the control program stored in the memory and determines the start / stop (number of operating units) and the operating frequency of each pump 2 based on the conditions set on the operation panel 12 and signals from various sensors. Then, they are transmitted to the inverter 5 to control the rotation frequency of the pump 2. Further, the control board 9 performs control such as stopping the operation of the pump 2 or switching the operation to another pump 2 based on a signal from various sensors or a trip signal from the inverter 5.

  The control panel 10 includes a power circuit 100, a control board 9 on which a control circuit (more specifically, a circuit element) 101 is mounted, and a control board case 110 that houses the power circuit 100 and the control circuit 101. I have.

  The control board case 110 includes a case body 111 in which the power circuit 100 and the control board 9 are arranged, and a case cover 112 that covers the case body 111. The case cover 112 includes a cover body 113 that covers the power circuit 100 and the control board 9, and a side cover 114 corresponding to a side surface of the control board case 110.

  The power circuit 100 is a circuit for supplying electric power to the motor 3. In the embodiment shown in FIGS. 4 and 5, power circuit 100 includes a reactor (eg, an AC reactor (ACL) or a DC reactor (DCL)) 115, a noise filter (NF) 116, an earth leakage breaker (ELB) 117, and A power supply terminal block 118 is included.

  In the present embodiment, the inverter 5 is not housed in the control panel 10, but is housed in an inverter case 6 attached to the motor casing 4. That is, the inverter 5 is provided separately from the control panel 10. Therefore, the control panel 10 does not need to accommodate the inverter 5, and the overall size of the control panel 10 can be reduced.

  The control circuit 101 is a circuit for controlling the pump 2. The control circuit 101 is mounted on the mounting surface 9a of the control board 9. The surface opposite to the mounting surface 9a of the control board 9 is a back surface 9b. The control circuit 101 is disposed on the mounting surface 9a side of the control board 9, and the power circuit 100 is disposed on the back surface 9b side of the control board 9 opposite to the mounting surface 9a.

  FIG. 6 is a perspective view of the case cover 112 when the case cover 112 is viewed from a direction (opposite direction) different from the direction shown in FIG. When the control board case 110 is assembled, the cover main body 113 includes an upper surface portion 120 located above the power circuit 100 and the control substrate 9, and a slope portion 121 connected to the upper surface portion 120 and provided with the operation panel 12. And a front part 122 connected to the slope part 121 and adjacent to the noise filter 116 and the power terminal block 118. The slope 121 is disposed between the upper surface 120 and the front surface 122. The side cover 114 is connected to the upper surface portion 120, the inclined surface portion 121, and the front surface portion 122, and is arranged on the side of the cover main body 113.

  The case main body 111 includes a back plate 125 that forms the back surface of the control board case 110, a bottom plate 126 that forms the bottom surface of the control board case 110, and a side plate 127 that forms the side surface of the control board case 110. When the control board case 110 is assembled, the back plate 125 and the front part 122 are arranged parallel to each other. The bottom plate 126 and the upper surface 120 are arranged in parallel with each other. The side cover 114 and the side plate 127 are arranged in parallel with each other.

  The control panel 10 includes a mounting plate 130 to which the control board 9 is mounted. In the present embodiment, the control board 9 is mounted on the mounting plate 130 via the spacer bolt 134. Therefore, the back surface 9b of the control board 9 is separated from the mounting plate 130.

  The mounting plate 130 is arranged in parallel with the control board 9 and is detachably mounted on the control board case 110. More specifically, the mounting plate 130 is detachably attached to the back plate 125 and the bottom plate 126 of the case main body 111.

  Since the mounting plate 130 is detachably attached to the case main body 111, the control board 9 is replaced with a new control board 9 by replacing the mounting plate 130 with the control board 9 to be replaced mounted. can do. Even when the shape of the control board 9 is changed, the operator only needs to replace the mounting plate 130 and / or process the mounting plate 130.

  A wall member 140 extending perpendicularly to the mounting plate 130 is fixed to the mounting plate 130 (see FIGS. 4, 5, and 6). The wall member 140 is a member that separates the reactor 115 and the earth leakage breaker 117, and extends parallel to the back plate 125. The wall member 140 is connected to the mounting plate 130 and the side plate 127.

  Inside the control panel 10 (more specifically, the control board case 110), electric components (that is, the power circuit 100 and the control circuit 101) indispensable for the operation of the water supply device 1 are arranged. When the temperature inside the control panel 10 becomes high, the operation of the water supply device 1 may be stopped due to a failure of the electric component.

  Therefore, in the present embodiment, the control panel 10 has a structure in which electric components in the control panel 10 are cooled by air sent from the cooling fan 25. With such a structure, the water supply device 1 can cool the electric components arranged inside the control panel 10 without providing a fan inside the control panel 10.

  FIG. 7 is a plan view of the case main body 111. In FIG. 7, components other than the case main body 111, a vent hole 200 described later, and the cooling fan 25 are omitted. In the present embodiment, the control panel 10 has a ventilation hole 200 formed in the bottom plate 126 of the case main body 111. As shown in FIG. 7, the ventilation hole 200 is disposed downstream of the cooling fan 25 in the flow direction of the air formed by the rotation of the cooling fan 25.

  In the present embodiment, a plurality (four) of the ventilation holes 200 are provided, but the number of the ventilation holes 200 is not limited to this embodiment. At least one vent hole 200 may be provided. The ventilation hole 200 is a long hole extending along the air flow direction, that is, the direction of the axis CL of the drive shaft 11.

  8 and 9 are views showing the positional relationship between the bottom plate 126 of the case main body 111 and the assembly casing 55 of the electric motor assembly 30. In the embodiment shown in FIG. 8, the bottom plate 126 has a flat plate shape extending in the horizontal direction, and in the embodiment shown in FIG. 9, the bottom plate 126 has a curved shape along the outer surface shape of the assembly casing 55. . In the embodiment shown in FIG. 9 as well as in the embodiment shown in FIG. 8, the bottom plate 126 of the case main body 111 has a surface facing the motor assembly 30 (more specifically, the assembly casing 55) of the control panel 10. Is composed. The ventilation holes 200 are arranged on the facing surface of the control panel 10. In the embodiment shown in FIG. 9, the plurality of ventilation holes 200 formed in the bottom plate 126 having a curved shape extend toward the drive shaft 11 (more specifically, the axis CL).

  In one embodiment, the control panel 10 may be located on the side of the motor assembly 30. Even in this case, the ventilation holes 200 are arranged on the surface of the control panel 10 facing the electric motor assembly 30. The facing surface of the control panel 10 is not limited to the bottom plate 126 but may be the back plate 125 or the side plate 127 of the case main body 111, and may be the surface of the side cover 114 of the case cover 112 or the surface of the cover main body 113 (that is, the front surface 122 , The slope portion 121, or the upper surface portion 120).

  FIG. 10 is a diagram showing a flow of air formed by the cooling fan 25. When the cooling fan 25 rotates, air around the fan cover 51 passes through the opening 51 a and is sucked into the fan cover 51. The air that has flowed into the fan cover 51 comes into contact with the cover member 46 (see FIG. 3) to remove heat generated from the inverter 5, and further, the outer surface of the assembly casing 55 along the axis CL of the drive shaft 11. Flowing over.

  The air sent from the cooling fan 25 flows on the outer surfaces of the inverter frame 45 (see FIG. 3) and the motor frame 40 (see FIG. 3) while being in contact with the fins 56 and 58 (see FIG. 3). The heat generated from the motor 3 is taken away.

  In the present embodiment, the control panel 10 is disposed above the motor frame 40. Part of the air flowing through the gap between the bottom plate 126 of the control panel 10 and the motor frame 40 flows into the inside of the control panel 10 through the ventilation holes 200 formed in the bottom plate 126, and the electric components (the control circuit 101 and the The power circuit 100) is cooled. Therefore, it is possible to prevent the operation of the water supply device 1 from being stopped due to the failure of the electric component.

  According to the present embodiment, since the control panel 10 is separated from the motor frame 40, more specifically, is disposed above the motor frame 40, the assembly casing 55 is Even if it vibrates, the vibration of the assembly casing 55 is not transmitted to the control panel 10. Since the control panel 10 has the ventilation holes 200, air flowing by the cooling fan 25 fixed to the drive shaft 11 can be sent into the control panel 10. Therefore, there is no need to provide a new fan inside the control panel 10. As described above, the water supply device 1 has an air-cooled forced-ventilation structure that cools electric components in the control panel 10 without transmitting vibration of the assembly casing 55 to the control panel 10.

  In one embodiment, the control panel 10 may be located above the pump 2. During the operation of the pump 2, since water is present inside the pump 2, the surface temperature of the pump casing 21 is low. The air flowing over the surface of the motor assembly 30 contacts the pump casing 21 and is cooled. When the control panel 10 is disposed above the pump 2, the cooled air flows into the control panel 10 through the ventilation holes 200 and cools the electric components in the control panel 10 more effectively.

  FIG. 11 is a diagram showing the guide part 201 connected to the ventilation hole 200. As shown in FIG. 11, the control panel 10 includes a guide portion 201 connected to the air hole 200 and inclined with respect to a direction perpendicular to the direction of the axis CL of the drive shaft 11. The guide part 201 is a bending member in which a part of the bottom plate 126 is bent toward the assembly casing 55.

  The guide portion 201 is inclined so that air flowing in the direction of the axis CL of the drive shaft 11 is efficiently sent to the inside of the control panel 10. As shown by the arrow in FIG. 11, a part of the flowing air collides with the guide unit 201, the flow direction of the air is changed, and the air is sent into the control panel 10. As described above, the inclined guide portion 201 can smoothly change the flow direction of air, and can more effectively send air into the control panel 10.

  FIG. 12 is a diagram showing another embodiment of the ventilation hole 200. As shown in FIG. 12, the ventilation hole 200 may be a ventilation part composed of a plurality of openings 200a. In this embodiment, each ventilation hole 200 is provided with ten openings 200a, but the number of openings 200a is not limited to this embodiment. Each ventilation hole 200 may be provided with at least two openings 200a. The plurality of openings 200a constituting each ventilation hole 200 are arranged in series along the direction of air flow formed by the cooling fan 25 (that is, the direction of the axis CL of the drive shaft 11).

  The embodiment shown in FIG. 11 and the embodiment shown in FIG. 12 may be combined. That is, the guide part 201 may be provided in each opening 200a.

  FIG. 13 and FIG. 14 are views showing a water supply device 1 provided with another embodiment of the support member 65. The configuration of this embodiment, which is not particularly described, is the same as that of the above-described embodiment, and a duplicate description thereof will be omitted.

  As shown in FIGS. 13 and 14, the support member 65 is fixed to the base 60 and extends upward from the surface of the base 60, and the leg 66 is fixed to the leg 66, and the control panel 10 is mounted thereon. And a base 67 to be placed.

  The leg 66 extends to above the motor casing 4, and the gantry 67 fixed to the leg 66 is disposed above the motor casing 4. The gantry 67 extends in a direction parallel to the surface of the base 60 (that is, in a horizontal direction), and has a size on which the control panel 10 can be mounted.

  In the embodiment shown in FIGS. 13 and 14, the gantry 67 supports the control panel 10 at a position above the electric motor assembly 30, and the bottom plate 126, which constitutes the opposing surface of the control panel 10, is connected via the gantry 67. It faces the assembly casing 55. In one embodiment, the gantry 67 may support the control panel 10 at a position above the pump 2.

  FIG. 15 is a diagram illustrating a slit 210 formed in the gantry 67. As shown in FIG. 15, the gantry 67 has a slit 210 that extends along the direction of air flow formed by the cooling fan 25 (that is, the direction of the axis CL of the drive shaft 11). The slit 210 is a long hole like the vent hole 200. In one embodiment, the slit 210 may be comprised of a plurality of openings, similar to the vent 200 described in the embodiment shown in FIG.

  In the embodiment shown in FIG. 15, a plurality (four) of slits 210 are provided, but the number of slits 210 is not limited to this embodiment. At least one slit 210 may be provided. In one embodiment, the number of slits 210 may correspond to the number of vents 200.

  FIG. 16 is a diagram showing one embodiment of the positional relationship between the ventilation holes 200 formed in the bottom plate 126 of the case main body 111 and the slits 210 formed in the gantry 67. The control panel 10 is placed on the gantry 67 such that the ventilation holes 200 face the slits 210. In the embodiment shown in FIG. 16, the ventilation holes 200 and the slits 210 are arranged so as to overlap each other when the control panel 10 is viewed from above.

  In the embodiment shown in FIG. 16, the length of the slit 210 is shorter than the length of the vent hole 200, but the length of the slit 210 may be the same as the length of the vent hole 200 or the length of the vent hole 200. It may be longer. Here, the length of the ventilation hole 200 (and the slit 210) means a length in a direction parallel to the direction of the axis CL of the drive shaft 11.

  FIG. 17 is a diagram illustrating the spacer 212 disposed between the facing surface (the bottom plate 126) of the control panel 10 and the gantry 67. As shown in FIG. 17, the water supply device 1 includes a spacer 212 that forms a gap between the control panel 10 and the gantry 67. An example of the spacer 212 is a nut. A bolt (not shown) for fastening the bottom plate 126 and the gantry 67 to each other is inserted into a nut serving as a spacer 212 disposed between the bottom plate 126 and the gantry 67. By tightening the bolt, the control panel 10 and the gantry 67 can be fastened while forming a gap between the bottom plate 126 and the gantry 67.

  FIG. 18 is a diagram illustrating another embodiment of the positional relationship between the ventilation holes 200 formed in the bottom plate 126 of the case main body 111 and the slits 210 formed in the gantry 67. As shown in FIG. 18, the ventilation holes 200 and the slits 210 are arranged alternately when the control panel 10 is viewed from above. The vent hole 200 is, in other words, adjacent to the slit 210.

  FIG. 19 is a vertical sectional view of the case main body 111 and the gantry 67 shown in FIG. As shown in FIG. 19, a part of the air flowing through the assembly casing 55 of the electric motor assembly 30 passes through a slit 210 formed in the gantry 67. The slit 210 (or the ventilation hole 200) is disposed between the adjacent ventilation holes 200 (or the slit 210) when the control panel 10 is viewed from above. Therefore, the air that has passed through the slit 210 collides with the bottom plate 126, and the flow direction of the air is changed. Thereafter, the air passes through the ventilation holes 200 and flows into the control panel 10.

  According to the present embodiment, the water supply device 1 having such a structure can prevent foreign substances such as dust and dust flying in the air from entering the control panel 10. That is, even if the foreign matter passes through the slit 210 together with the air flowing by the rotation of the cooling fan 25, the foreign matter collides with the bottom plate 126 and does not pass through the ventilation hole 200. As described above, the intrusion of the foreign matter into the control panel 10 is hindered by the bottom plate 126, so that the foreign matter does not enter the inside of the control panel 10.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and may be embodied in various different forms within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Water supply device 2 Pump 3 Motor 4 Motor casing 5 Inverter 6 Inverter case 9 Control board 9a Mounting surface 9b Back surface 10 Control board 11 Drive shaft 12 Operation panel 15 Mounting structure 20 Impeller 21 Pump casing 21a Suction port 21b Discharge port 22 Suction pipe 23 Discharge Pipe 25 Cooling Fan 30 Motor Assembly 31 Rotor 32 Stator 32a Stator Core 32b Windings 33,35 Through Holes 36,38 Bearing Supports 37,39 Bearing 40 Motor Frame 42 End Cover 43 Motor Side Plate 45 Inverter Frame 46 Cover member 47 Inverter element 48 Inverter board 50 Shaft cover 51 Fan cover 51a Opening 55 Assembly casing 56, 58 Fin 60 Base 60a Outer edge 61 Pump stand 62 Motor stand 65 Support member 66 Leg 67 Mounting base 10 Power circuit 101 Control circuit 110 Control board case 111 Case main body 112 Case cover 113 Cover main body 114 Side cover 115 Reactor 116 Noise filter 117 Earth leakage breaker 118 Power supply terminal block 120 Top section 121 Slope section 122 Front section 125 Back plate 126 Bottom plate 127 Side plate 130 mounting plate 134 spacer bolt 140 wall member 200 vent hole 200a opening 201 guide section 210 slit 212 spacer

Claims (10)

A control panel in which electric components are arranged,
The control panel has a ventilation hole through which air flowing by rotation of a cooling fan fixed to a drive shaft of the motor assembly can pass,
The control panel according to claim 1, wherein the ventilation hole is formed on a surface of the control panel facing the motor assembly.   The control panel is characterized in that the control panel can be supported by the gantry so that the ventilation hole is adjacent to a slit formed in the gantry supporting the control panel when viewed from above. Item 2. The control panel according to Item 1.   The control panel according to claim 2, wherein the control panel can be supported on the gantry via a spacer that forms a gap between the control panel and the gantry.   4. The control panel according to claim 1, wherein the ventilation hole extends along a flow direction of air formed by the cooling fan. 5.   5. The control panel according to claim 1, wherein the control panel includes a guide portion connected to the ventilation hole and inclined with respect to a direction perpendicular to an axial direction of the drive shaft. 6. Control panel as described. Pump and
An electric motor assembly for driving the pump;
A cooling fan fixed to a drive shaft of the motor assembly;
A control panel having an air component through which an electric component is disposed, and through which air flowing by rotation of the cooling fan can pass;
The water supply device, wherein the vent hole is formed in a surface of the control panel facing the electric motor assembly. The water supply device further includes a gantry supporting the control panel,
The gantry has a slit,
The water supply device according to claim 6, wherein the control panel is supported by the gantry such that the ventilation hole is adjacent to the slit when the control panel is viewed from above.   The water supply device according to claim 7, further comprising a spacer disposed between the control panel and the gantry, and further including a spacer forming a gap between the control panel and the gantry. Water supply device.   The water supply device according to any one of claims 6 to 8, wherein the ventilation hole extends along a flow direction of air formed by the cooling fan.   The control panel according to any one of claims 6 to 9, wherein the control panel includes a guide portion connected to the ventilation hole and inclined with respect to a direction perpendicular to an axial direction of the drive shaft. Water supply device as described.

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