JPH08284831A - Pump operating control panel and pump unit using same - Google Patents

Abstract

PURPOSE: To provide a control panel for pump operation, in which the heat generated by an inverter unit accommodated in a housing is discharged outside in order to restrict the temperature-rise within the housing, and to provide a pump unit in which the control panel is used. CONSTITUTION: In a control panel, an inverter unit including component parts for an inverter circuit is accommodated in a housing 20 in order to control a motor for driving a pump standing outside by means of the inverter circuit. A part of an outer wall of the housing 20 is formed with a radiating board 30, while the inverter unit is installed in the inner surface of this radiating board 30. Moreover, a cooling fan 42, which forcibly cools the outer surface of this radiating board 30 through blasting, is prepared. With this contrivance, the heat generated by the inverter unit is transferred to the radiating board 30, and this heat is forcibly cooled by the blasting of a cooling fan 42. As a result, the heat is prevented from remaining in the housing 20, and the temperature-rise within the housing 20 can be restricted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel used for controlling the operation of a pump drive motor by an inverter circuit, and a pump device using the control panel.

[0002]

2. Description of the Related Art When a pump is automatically operated, a method of controlling the rotation speed of an induction motor for driving the pump by an inverter circuit is adopted. In this type of inverter circuit, a power element including a switching element such as a bipolar transistor, FET, or IGBT is used in addition to a capacitor and a transformer, and this power element has a property of generating heat during operation. For this reason, if an inverter unit having the above power device incorporated in an inverter circuit is hermetically housed in the housing of the control panel, the temperature inside the control panel housing rises due to the heat generated from the inverter unit, and the inverter unit Thermally adversely affects itself and other housing components, causing malfunction and shortened life.

Therefore, in the conventional commercially available inverter unit, as shown in FIGS. 11 to 13, the inverter units a and a themselves have the heat radiation fans b and b and the heat radiation fins c and c. In this case, the heat radiated from the power element (not shown) is radiated to the outside of the inverter units a and a by the heat radiation fans b and b and the heat radiation fins c and c.

However, when such a commercially available inverter unit a, a is used by being housed in the control panel housing d shown in FIGS. 11 to 13, the heat is discharged through the heat radiation fans b, b and the heat radiation fins c, c. The generated heat stays in the housing d, and the temperature in the housing d rises. In order to prevent this, the conventional housing is provided with a ventilation hole e in the side wall, a ventilation fan f is installed in this ventilation hole e, and the heat in the housing d is released to the outside by this ventilation fan f. It was

According to such a conventional structure, there is an advantage that a commercially available inverter unit a can be used and the temperature rise in the housing d can be suppressed. 11 to 13, the same members as those in the embodiment described later are designated by the same reference numerals and the description thereof will be omitted.

[0006]

However, in the conventional case, the inverter unit a itself has a radiation fin b, and a ventilation fan f is also installed in the control panel housing d to release the heat in the housing d to the outside. Since this structure is used, the number of parts increases and the structure for heat dissipation becomes complicated.

Since the heat dissipation fan b is incorporated in the inverter unit a itself, the size of the inverter unit a is increased, especially the size thereof is increased, and the size of the control panel housing d is also increased, so that the whole size is increased. Further, since the outside air is exchanged and introduced into the control panel housing d, dust and moisture may invade, hindering the functions of the inverter unit a and other housing parts, and shortening the life.

The present invention has been made in view of the above circumstances. An object of the present invention is to efficiently release the heat generated by the inverter unit to the outside of the control panel housing without using a fan inside the control panel housing. An object of the present invention is to provide a pump operation control panel capable of suppressing the temperature rise in the housing and a pump device using the same.

[0009]

According to a first aspect of the present invention, there is provided a housing; an inverter unit housed in the housing, the inverter unit including circuit components of an inverter circuit for controlling an external pump driving motor; A heat radiating plate to which the unit is attached and which is attached to the housing and constitutes a part of an outer wall of the housing;
And a cooling fan fixed to the housing or the heat radiating plate for forcibly cooling the outer surface of the heat radiating plate by blowing air.

According to a second aspect of the invention, the pump operation according to the first aspect is characterized in that an opening is formed in the bottom plate of the housing, and the heat dissipation plate is attached to the bottom plate of the housing to close the opening. Control panel.

According to a third aspect of the present invention, a plurality of inverter units are attached to the heat dissipation plate, and a plurality of cooling fans are attached to correspond to these inverter units. Is a control panel for pump operation described in.

According to a fourth aspect of the present invention, the cooling fan is fixed to a mounting plate, and the mounting plate is mounted on the housing or the heat radiating plate. Is a control panel for pump operation described in.

According to a fifth aspect of the present invention, the cooling fan blows a large amount of air to a portion of the heat dissipation plate where the temperature rise is large.
The pump operation control panel according to any one of claims 1 to 4, wherein the pump control panel is attached in a posture inclined with respect to the heat radiating plate.

The invention according to claim 6 is characterized in that the electric connection line of the cooling fan is connected to the operation control section of the cooling fan via a connector. It is a control panel for pump operation.

According to a seventh aspect of the present invention, a base, a pump mounted on the base, a motor mounted on the base or the pump and driving the pump, and a motor mounted on the base. A pump operation control panel according to any one of claims 1 to 6, wherein an inverter unit for controlling the operation of the pump is housed.

[0016]

According to the first aspect of the invention, the heat generated from the heat generating portion of the inverter unit is transmitted to the heat radiating plate and is radiated to the outside air from the outer surface of the heat radiating plate. Moreover, since the outer surface of the heat sink is forcibly cooled by the air blown from the cooling fan, the heat dissipation performance from the heat sink is improved. Therefore, heat is not accumulated in the housing, and the temperature rise in the housing is suppressed.

According to the second aspect of the present invention, since the heat dissipation plate is attached to the opening formed in the bottom plate of the housing, the same layout as the conventional one can be realized, and a wide area of the bottom plate can be utilized, so that the heat dissipation area can be utilized. Can be increased.

According to the third aspect of the present invention, since a plurality of inverter units are attached to the heat radiating plate and cooling fans are attached corresponding to these inverter units, the heat generation of each inverter unit is controlled by each cooling fan. Can be forcedly released into the atmosphere. In addition, even if one cooling fan fails, the other cooling fan can blow air, so that the heat radiation performance does not significantly decrease.

According to the invention of claim 4, since the cooling fan is attached to the housing or the heat radiating plate via the attaching plate, it is easy to adjust the direction of air flow and the maintenance is easy.

According to the fifth aspect of the present invention, since the cooling fan blows a large amount of air to a portion of the heat dissipation plate where the temperature rises significantly, the heat dissipation performance is improved. According to the invention of claim 6,
Since the electric connection wire of the cooling fan is connected to the operation control unit of the cooling fan via the connector, wiring work is easy when replacing the cooling fan. According to the invention of claim 7, it is possible to provide a pump device making use of the advantages of the control panel according to claims 1 to 6.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in FIGS. 9 and 10 show a pump device that alternately or in parallel operates a plurality of pumps using an inverter circuit. In the figure, 1 is a base, 2 and 2 are pumps, and 3 and 3 are pumps 2 and 2, respectively. Induction motors, 4, 4 suction flanges of each pump, 5, 5 discharge piping of each pump, 6 discharge flange, 7 pressure sensor, 8 flow sensor, 9 check valve, 10 control panel, 11
Is a control panel support leg, and 12 is an accumulator.

In such a pump device, the discharge pressure and the discharge flow amount are detected by the pressure sensor 7 and the flow rate sensor 8, and the control device housed in the control panel 10 has two pumps 2 and 2 in accordance with the detection signals. It is designed to control the independent operation, the parallel operation, or the alternate operation in the case of the independent operation.

The structure of the control panel 10 is shown in FIGS. 1 to 8, which will be described below. In the figure, reference numeral 20 denotes a control panel housing, which is made of metal or a material capable of shielding radiated noise, and has a bottom plate 21, side plates 22 on four sides rising from the bottom plate 21, and the housing 20. A closed space is formed by the double doors 23, 24 that open and close the front surface. An instrument 25 and a display panel 26 are attached to the open / close doors 23 and 24.

A large opening 27 is formed in the bottom plate 21 at a portion where the inverter unit is to be attached. Noise filters 28, 28 are provided with screws 29 ... In a portion other than the opening 27 as shown in FIG. Is installed through.

A radiator plate 30 is attached to the opening 27. The heat radiating plate 30 is made of a metal having excellent thermal conductivity such as copper and aluminum, has an inner surface formed into a flat surface, and has a large number of heat radiating fins 31 formed on the outer surface.
Are formed integrally with each other.

Two inverter units 32, 32, an electronic control wiring board 33 and earth leakage breakers 34, 34 are attached to the inner surface of the heat dissipation plate 30. As shown in FIGS. 7 and 8, the inverter units 32, 32 include a power element 322 forming an inverter circuit on a unit board 321 having excellent thermal conductivity such as a copper plate.
, A smoothing capacitor 323 ..., An inverter control wiring board 324 on which other circuit parts are arranged, and a digital display unit 325 for displaying a current value or frequency sent to the pump are integrally mounted. The power element 322 is composed of a switching element such as a bipolar transistor, FET, or IGBT.

Such inverter units 32, 32
Has screws 35 at the four corners of the unit boards 321 and 321.
It is attached to the heat sink 30 by. In this case, the power element 322 that causes the largest heat generation is the heat sink 30.
The heat of the power element 322 comes into direct contact with the inner surface of the heat dissipation plate 3
It is installed so that it can be effectively transmitted to 0.

The electronic control wiring board 33 and the earth leakage breakers 34, 34 are also attached to the inner surface of the heat radiating plate 30 via screws 36. For this reason,
Two inverter units 3 are provided on the inner surface of the heat sink 30.
2, 32, one electronic control wiring board 33, and two earth leakage breakers 34, 34 are attached. That is, the heat dissipation plate 30 has an area enough to mount the two inverter units 32, 32, the one electronic control wiring board 33, and the two earth leakage breakers 34, 34.

Such a heat dissipation plate 30 is superposed on the bottom plate 21 of the housing 20 from the outside so as to hide the opening 27, and the bottom plate 2 is arranged from the inside of the housing 20.
1 are fixed by screws 38. Therefore, the inverter units 32, 32, the electronic control wiring board 33, and the earth leakage breakers 34, 34 attached to the inner surface of the heat dissipation plate 30 are housed inside the housing 20, and the heat dissipation fins 31 ... Are exposed on the outer surface. There is.

Fan units 40, 40 are attached to the outside of the housing 20. These fan units 40, 40 include, for example, two cooling fans 42, 42 in a fan casing 41 as shown in FIGS.
Are arranged side by side, and these cooling fans 42, 42 are simultaneously driven to rotate by motors not shown.

The fan casing 41 has a mounting plate 43.
The attachment plate 43 is attached to the side surface of the heat dissipation plate 30 via screws 44, 44, as shown in FIG. The mounting plate 43 is the housing 2
It may be fixed to the bottom plate 21 of 0 or the like.

In this case, the fan casing 41 is mounted on the cooling fan 4 via the mounting plate 43 as shown in FIG.
It is fixed to the side surface of the heat radiating plate 30 in such a posture that the center axes of rotation of the heat radiating plates 2 and 42 are inclined with respect to the outer surface of the heat radiating plate 30. Since the cooling fans 42, 42 are attached so as to be inclined, the air blown from the cooling fans 42, 42 strikes the outer surface of the heat sink 30 obliquely, as indicated by the arrow in FIG. The location where the wind hits is set to be the location where the temperature of the heat dissipation plate 30 is highest, for example, the outer surface region of the heat dissipation plate 30 facing the power element 322 that causes the above-mentioned maximum heat generation. The cooling fans 42, 42
The angle at which the central axis of rotation of the is inclined with respect to the outer surface of the heat dissipation plate 30 is effectively 5 to 45 degrees.

In this embodiment, since two inverter units 32, 32 are used, two fan units 40, 40 are also attached, and each fan unit 40, 40 has an inverter unit 32. , 32, the air is blown toward the respective areas of the heat radiating plate 30, which are the back surfaces of the inverter units 32, 32.

Each of these fan units 40, 40 includes
The electrical connection lines 45, 45 are connected, and these electrical connection lines 45, 45 are connected to the housing 20 as shown in FIG.
It is guided to the inside of the housing 20 by penetrating the side wall at the lower side thereof, and is connected to a power source or a fan operation control unit (not shown) which is specially configured inside the housing 20 by a connector 46.

The operation of the embodiment having such a structure will be described. Inverter unit 3 while the pump device is operating
2, 32, especially the power element 322 which causes the largest heat generation
Heats up. This heat is a unit substrate 3 having excellent thermal conductivity.
21 is transmitted to the heat radiating plate 30 and is emitted to the outside of the panel from the outer surface of the heat radiating plate 30, particularly the large number of heat radiating fins 31.

In this case, the heat sink 30 includes two inverter units 32, 32 and one electronic control wiring board 33.
And the two leakage breakers 34, 34 have a large area capable of being arranged in a plane, the heat capacity of the heat sink 30 itself is large, and the heat radiation area is large, and the two inverter units 32 are provided. , 32 is large enough to dissipate the heat generated from the board.

The pumps 2 and 2 are rarely operated in parallel at the same time, and in most cases, they are operated independently by alternating operation.
Most of the time, one of the inverter units 32 operates, and the above-mentioned two inverter units 32,
If the heat dissipation plate 30 has the ability to dissipate the heat generated by 32, the temperature rise in the housing 20 can be effectively suppressed.

Moreover, in this case, while the pump device is operating, the fan units 40, 40 are also energized to operate the respective cooling fans 42 .... These cooling fans 4
2 blows air toward or along the outer surface of the heat radiating plate 30, so that the heat radiating plate 30 is forcibly cooled.
In particular, the central axis of rotation of the cooling fans 42, 42 is the heat dissipation plate 30.
3 is attached to the outer surface of the cooling fan 42, the air blown from the cooling fans 42, 42 causes the heat radiation plate 30 to have the highest temperature, that is, the largest cause of heat generation, as shown by the arrow in FIG. Heat sink 30 facing the power element 322
Since it is applied to the outer surface of the, the area where the temperature rises is effectively forcibly cooled.

Further, in this embodiment, since the two inverter units 32, 32 are used, the fan unit 40,
Since two 40 are installed, each fan unit 4
0 and 40 bear the heat generated by the respective inverter units 32 and 32, and perform forced cooling.

Therefore, the heat transmitted to the heat dissipation plate 30 is effectively released to the outside, and the temperature rise of the heat dissipation plate 30 is suppressed. From this, the heat radiated into the control panel housing 20 is reduced, and the temperature rise in the control panel housing 20 is suppressed.

Therefore, it is not necessary to provide a special ventilation hole e in the housing 20 or to install a ventilation fan f in the ventilation hole e as in the conventional case, so that the number of parts is reduced and the structure is simplified.

Further, the inverter unit 32 itself does not require the heat radiation fan b or the heat radiation fin c, which is a special specification not commercially available, but the height dimension can be reduced,
The size of the control panel housing 20 can be reduced as compared with the conventional case, and the entire size can be reduced. Then, since dust and humidity do not enter the control panel housing 20, the inverter unit 31 and other housing parts 2
It is also possible to prevent problems such as hindering the functions of 8, 33 and 34 and shortening the life.

In the case of the above-described embodiment, two inverter units 32, 32 are attached to the heat sink 30, and these inverter units 32, 32 are attached.
Since the fan units 40, 40 are attached to the respective fan units 32, 32, even if one of the fan units 40 fails and the cooling fan 42 becomes inoperable, the cooling fans 42 of the other fan units 40 ... Since it is possible to blow air, it is possible to suppress a significant decrease in heat dissipation performance.

The fan unit 40 is attached to the mounting plate 43.
Since it is attached to the heat radiating plate 30 or the housing 20 via the, it is easy to adjust the direction of the air blow, and it is easy to carry out maintenance such as removal and repair.

Further, since the electric connection line 45 connected to the cooling fan 42 of the fan unit 40 is connected to the power source and the operation control unit via the connector 46, the connector 46 is removed when the fan unit 40 is removed. Wiring can be done easily because the wiring can be removed at the part.

In the above embodiment, two pumps 2, 2 are used.
I explained the case of the pump unit with
The present invention is not limited to the use of a plurality of pumps, and can be implemented even when controlling the operation of one pump.

Therefore, the control panel is not limited to having the two inverter units 32, 32, and may be a control panel having one inverter unit 32. Furthermore, the fan unit 40 may use only one fan unit 40 regardless of whether a plurality of inverter units 32 are used or when one inverter unit 32 is used.

The fan unit 40 is not limited to a structure in which two cooling fans 42, 42 are attached to one fan casing 41, and one fan casing 41 has one
One cooling fan 42 may be attached.

Further, the heat dissipation plate 30 is not limited to being attached to the bottom plate 21 of the housing 20, but may be attached to the side plates 22 ... Further, it is not necessary to attach the heat dissipation plate 30 so as to close the specially formed opening 27. Not limited to, bottom plate 21 or side plate 22
All of each of the ... May be configured by heat sinks.

[0050]

As described above, according to the first aspect of the invention, the heat generated from the heat generating portion of the inverter unit is transmitted to the heat radiating plate and is radiated to the outside air from the outer surface of the heat radiating plate. Moreover, since the outer surface of the heat sink is forcibly cooled by the air blown from the cooling fan, the heat dissipation performance from the heat sink is improved. Therefore, heat is not accumulated in the housing, and the temperature rise in the housing is suppressed.

Therefore, it is not necessary to form a special ventilation hole in the housing or to install a ventilation fan in the housing as in the conventional case, so that dust and moisture do not enter the housing, and the inverter unit and other It is possible to prevent problems such as hindering the function of the housing parts and shortening the life. Further, since the cooling fan is provided outside the housing, maintenance becomes easy.

Further, the inverter unit itself does not require a heat radiation fan or a heat radiation fin, the inverter unit can be downsized, and the housing can be downsized as compared with the conventional one.

According to the second aspect of the present invention, since the heat dissipation plate is attached to the opening formed in the bottom plate of the housing, the same layout as the conventional one can be realized, and a wide area of the bottom plate can be used, so that the heat dissipation area can be utilized. Can be increased.

According to the third aspect of the present invention, since a plurality of inverter units are attached to the heat radiating plate and cooling fans are attached corresponding to these inverter units, the heat generation of each inverter unit is generated by each cooling fan. Can be forcedly released into the atmosphere. In addition, even if one cooling fan fails, the other cooling fan can blow air, so that the heat radiation performance does not significantly decrease.

According to the invention of claim 4, since the cooling fan is attached to the housing or the heat radiating plate via the attaching plate, the direction of the blown air can be easily adjusted and the maintenance is easy.

According to the fifth aspect of the present invention, since the cooling fan blows a large amount of air to a portion of the heat dissipation plate where the temperature rise is large, the heat dissipation performance is improved. According to the invention of claim 6,
Since the electric connection wire of the cooling fan is connected to the operation control unit of the cooling fan via the connector, wiring work is easy when replacing the cooling fan. According to the invention of claim 7, it is possible to provide a pump device making use of the advantages of the control panel according to claims 1 to 6.

[Brief description of drawings]

FIG. 1 is a front view of a control panel housing showing an embodiment of the present invention.

FIG. 2 is a front view of the inside of the control panel housing with the opening / closing door removed in the embodiment.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a view taken along the line IV-IV of FIG.

FIG. 5 is a side view of the fan unit.

FIG. 6 is a front view of a fan unit.

FIG. 7 is a front view of an inverter unit.

FIG. 8 is a side view of the inverter unit.

FIG. 9 is a plan view of a pump unit using two pumps.

FIG. 10 is a front view of the pump unit.

FIG. 11 is a front view of the inside of the control panel housing with the opening / closing door removed in the conventional case.

12 is a sectional view taken along line XII-XII in FIG.

13 is a view taken along the line XIII-XIII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Pump 3 ... Induction motor 4 ... Suction flange 5 ... Discharge piping 10 ... Control panel 12 ... Accumulator 20 ... Control panel housing 21 ... Bottom plate 22 ... Side plate 23, 24 ... Door 27 ... Opening 28 ... Noise Filter 30 ... Radiating plate 31 ... Radiating fin 32 ... Inverter unit 33 ... Electronic control wiring board 34 ... Leakage breaker 321 ... Unit board 322 ... Power element 323 ... Smoothing capacitor 324 ... Inverter control wiring board 325 ... Digital display section 36 ... Screw 40 ... Fan unit 41 ... Fan casing 42 ... Cooling fan 43 ... Mounting plate 45 ... Connecting wire 46 ... Connector

Claims (7)

[Claims] 1. A housing; an inverter unit which is housed in the housing and includes circuit components of an inverter circuit for controlling an external pump driving motor; an inverter unit attached to an inner surface of the housing; A radiator plate attached to the housing or a part of the outer wall of the housing; and a cooling fan fixed to the housing or the radiator plate to forcibly cool the outer surface of the radiator plate by blowing air. Control panel for pump operation. 2. The pump operation control panel according to claim 1, wherein an opening is formed in the bottom plate of the housing, and the heat dissipation plate is attached to the bottom plate of the housing to close the opening. 3. The pump operation according to claim 1, wherein a plurality of inverter units are attached to the heat dissipation plate, and cooling fans are attached to the inverter units, respectively. Control panel. 4. The pump according to claim 1, wherein the cooling fan is fixed to a mounting plate, and the mounting plate is mounted to the housing or the heat dissipation plate. Operation control panel. 5. The cooling fan is attached in an inclined posture with respect to the heat radiating plate in order to blow a large amount of air to a portion of the heat radiating plate where a temperature rise is large. The control panel for pump operation according to any one of 4. 6. The pump operation according to claim 1, wherein the electric connection line of the cooling fan is connected to an operation control section of the cooling fan via a connector. control panel. 7. A base, a pump mounted on the base, a motor mounted on the base or the pump for driving the pump, and an inverter mounted on the base for controlling the operation of the motor. A pump device comprising: the pump operation control panel according to any one of claims 1 to 6 in which a unit is housed.