JP3499339B2 - control panel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel for controlling the rotational speed of a pump or the like using an inverter or the like, and more particularly to a control panel having a water cooling mechanism for heat sources such as an inverter.

[0002]

2. Description of the Related Art FIG. 10 shows a control panel in which a heat sink dissipates heat in a conventional inverter. FIG. 10A shows the bottom surface and FIG. 10B shows the side surface. This control board
As an example, the panel is a panel for speed control of a pump by an inverter, and contains an inverter 1 serving as a heat source, control devices 5 and 6 such as various relays, and wiring devices.

A hole 8 for taking in power is provided in the control panel chassis 4.
And the chassis 4 and the control panel case 3 form a box structure. The heat sink 12 is attached to the outside of the control board chassis 4, the inverter 1 is attached to the heat sink 12, and the heat of the inverter is radiated to the atmosphere outside the control board via the fins of the heat sink 12. An earth leakage breaker 5, an auxiliary relay or a control device 6 is mounted inside the control panel.

In the control panel shown in FIG. 10, when the output of the air-cooled inverter increases, the heat dissipation increases and the heat sink increases in size. However, since the inverter is downsized, the mounting area is small for the output. Is small. Therefore, there is a case where the sizes are compared as shown in FIG. In such a case, the heat of the inverter may not be uniformly transferred to the entire surface of the heat sink, the heat of the inverter may not be sufficiently dissipated, and the temperature of the inverter may rise.

In order to surely increase the size of the heat sink and dissipate the heat, cooling the inverter with water may be considered. 11A and 11B show a control panel in which the water cooling heat sink 2 is attached to the inverter 1. The control board chassis 4 is provided with a hole 8 for taking in power, the chassis and the control board case 3 form a box structure, and the water cooling heat sink 2 is attached to the outside of the control board chassis. The inverter 1 is attached to the water-cooled heat sink 2, and the heat of the inverter is dissipated to the outside through the cooling water flowing in the water-cooled heat sink. In the heat sink 2, cooling water is injected from the inlet 22 of the cooling pipe 21 and discharged from the outlet 23 to the outside of the control panel.
As in the case of air cooling, the earth leakage breaker 5, the auxiliary relay or the control device 6 is installed inside the control panel.

[0006]

By adopting such a structure, the heat of the inverter can be released to the outside of the control panel with a small water-cooled heat sink. The temperature in the atmosphere, the temperature in the control panel, and the temperature of the cooling water will vary, but if the temperature of the water-cooled heat sink surface is lower than the temperature in the control panel or in the atmosphere, the water content in the atmosphere and control panel will be There is a problem in that not only will water droplets be generated in the control panel, which will corrode the chassis, but also adversely affect electrical equipment in the control panel. Especially when the water-cooled heat sink is directly attached to the control board chassis, the heat of the water-cooled heat sink is transferred to the chassis and the heat is transferred to the chassis itself, and the temperature of the atmosphere and the temperature inside the control board are different from the temperature of the chassis. Therefore, moisture in the atmosphere and in the control panel will be exposed on both sides of the chassis.

[0007]

In a control panel according to a first aspect of the present invention, an inverter and a control device are housed in an envelope composed of a cover and a chassis, and a water cooling for cooling the inverter. attaching a heat sink to the outer surface of the chassis, a spacer provided between the water-cooled heat sink and the chassis so void is provided between the envelope of the chassis and the water-cooling heat sink, by the air gap
It is characterized in that the water-cooled heat sink and the envelope are thermally insulated .

Further, in the control panel according to the second aspect of the present invention, the inverter and the control device are housed in an enclosure constituted by a cover and a chassis, and the water cooling heat sink for cooling the inverter is provided in the chassis. attachment to the outer surface, so the air gap is formed between the said envelope of the chassis water cooled heat sink, to the chassis, provided with a protrusion which abuts against the rear surface of the water-cooled heat sink protrudes to the outside from the inside, the gap By the water cooled heat sink and the envelope
It is characterized in that and are thermally insulated .

In the control panel according to the third aspect of the present invention, a plurality of inverters, a control device, and a water-cooled heat sink for cooling the inverters are housed in an envelope composed of a cover and a chassis. The plurality of inverters are fixed to both sides of the water-cooled heat sink, the outer circumference of the water-cooled heat sink is covered with a heat insulating material, and further, the heat insulation is performed on both sides of the water-cooled heat sink on which the inverter is attached so that the surface of the water-cooled heat sink is not exposed. Paste the material ,
Insulate the surface of the water-cooled heat sink with the heat insulating material
Characterized in that it was.

Further, a heat insulating material is attached to the outer peripheral surface of the water-cooled heat sink, and the heat source is attached so that the outer peripheral surface of the water-cooled heat sink is not exposed.

Further, the water-cooled heat sink is provided with cooling pipes of a plurality of flow paths corresponding to a plurality of pumps.

Further, a heat insulating material is further attached to an exposed portion of a bolt for attaching the water cooling heat sink to the envelope.

According to the first aspect of the present invention, since the water-cooled heat sink is arranged with a gap between the water-cooled heat sink and the envelope of the control panel, the water-cooled heat sink and the envelope are thermally insulated. , The envelope itself is not cooled. Therefore, even if the inverter is sufficiently cooled by water, the envelope does not have the problem of dew drops.

According to a third aspect of the present invention, a plurality of ins.
Since the burner is fixed on both sides of the water-cooled heat sink plate and housed in the envelope, it can be cooled efficiently despite the large amount of heat generated from the inverter , and the control panel itself is compact. Can be Also,
Since the water-cooled heat sink plate in the envelope is covered with the heat insulating material, there is no problem such as generation of dew drops inside and outside the envelope.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. In the drawings, the same reference numerals indicate the same or corresponding parts.

1A and 1B show a control panel according to the first embodiment of the present invention. The control panel chassis 4 and the control panel cover 3 constitute an enclosure of the control panel, and the inverter 1, the earth leakage breaker 5, the auxiliary relay, the control device 6, etc. are built in the control panel. The water-cooled heat sink 2 is attached to the outside of the enclosure of the control panel, and a space A is provided between the heat sink 2 and the control panel chassis 4. An electric wire drawing hole 8 is formed in the bottom surface of the chassis 4. The water cooling heat sink 2 has a cooling water flow path 21.
Is provided, cooling water flows from the inlet 22 to the outlet 23, and heat generated in the inverter 1 is discharged. Since the space A as shown in the drawing is provided between the chassis 4 and the water-cooled heat sink 2, the chassis 4 is thermally insulated and is not cooled.

FIGS. 2A and 2B show how the chassis 4 of the control panel shown in FIG. 1 and the water-cooled heat sink 2 are attached. FIG. 2A shows a chassis 4 and a water-cooled heat sink 2.
Shown is a case where a spacer 13 is inserted between and and is fixed with a bolt 14. The spacer 13 is, for example, a plastic piece, and is fixed between the chassis 4 and the water-cooled heat sink 2 with an adhesive material. FIG. 2B shows the chassis 4 of the control panel.
Then, insert the spacers 15 into the bolts 14 so that the heat sink 2 maintains an appropriate gap, and insert the spacers 1 from the inside of the control panel.
It is attached with 4. A heat source, for example, a heat generating portion of the inverter 1 is attached to the water-cooled heat sink, and heat from the inverter is transmitted to the water-cooled heat sink so that the heat can be released to the outside of the control panel.

[0018] Figure 3, the chassis 4 of the control panel, as the heat sink 2 is maintained a suitable clearance, the projections on the chassis 4
2 shows a chassis structure provided with the convex portion 10 as the above.
The portion projecting outside the inner portion is provided in a portion of the chassis 4, the rear surface of the water-cooling heat sink 2 is because so as to abut on the protruding portion, the gap A is provided between the control panel chassis. By using a part of the collision detecting portion of the chassis according, without requiring the installation of special spacers to form a gap A. Due to the air gap A, the heat of the water-cooled heat sink 2 is not transferred to the chassis, so that dew drops do not occur on both surfaces of the chassis. Further, even if dew drops are generated on the surface of the water-cooled heat sink 2, the water is separated into the voids and does not enter the control panel.

FIG. 4 shows an example of a control panel provided with a plurality of water-cooled heat sinks 2. The rest of the configuration is the same as that of the first embodiment shown in FIG. 1, and the same components are assigned the same reference numerals and duplicate explanations are omitted. For example, in a water supply system for buildings, there is a large difference between when the water supply load is large and when the water supply load is small. When the load is light, the rotation speed control operation is performed by one pump, and when the load is heavy, the second pump is turned on and off. Controlled operation may be performed. In such a case, it is necessary to arrange two inverters in the control panel, and the embodiment shown in FIG. 4 is suitable for the application.

FIG. 5 shows a control panel according to the second embodiment of the present invention. In this embodiment, like the example shown in FIG. 4, the control panel is provided with two inverters, and both sides of one water-cooled heat sink 2 are used, and the inverters 1 and 1 can be attached to the surfaces. It is structured. The control panel of this embodiment includes two inverters 1 and 1 and the inverters 1 and 1.
It incorporates the earth leakage breaker 5 and the auxiliary relay or control device 6. One water-cooled heat sink 2 is built in a box-shaped control panel composed of a chassis 4 and a cover 3 as shown in the figure. The water-cooled heat sink 2 has two cooling water flow paths 21 and 24, each of which has an inlet 22, 2
5 and outlets 23, 26.

An example of the structure of the water-cooled heat sink used here is shown in FIGS. 6 and 7. The outer periphery of the water-cooled heat sink 2 is completely covered with the heat insulating material 27, and the inverter 1,
When the inverters 1 and 1 are installed,
A heat insulating material 28 is attached so that the surface of the water-cooled heat sink 2 is not exposed. Inside, a cooling pipe 21 and a cooling pipe 24 shown in FIG. 5 are embedded. The heat insulating material is, for example, a Styrofoam plate, which is attached with an adhesive.

The heat insulating material 27 is also attached to the mounting portions of the control board chassis 4 and the water cooling heat sink by bolts. The heat insulating material 30 is attached to the bolt heads so that the surface of the water cooling heat sink is not outside. Not only is this done, but the heat transfer from the mounting bolts is also insulated. Even when the temperature of the cooling water is lower than the temperature in the atmosphere and the temperature in the control panel, the surface of the water-cooled heat sink is insulated, so that temperature is not transmitted to the enclosure such as the chassis. Therefore, since the temperature inside the control panel and the temperature on the surface of the heat insulating material are the same, moisture inside and outside the control panel does not drop out, and the water-cooled heat sink does not adversely affect the electrical equipment inside the control panel. Absent.

FIG. 8 is a diagram showing a water cooling method of the inverter. In this embodiment, cooling water is taken in from between the discharge port of the pump 31 and the primary side of the discharge check valve, and the cooling water flow from the inlet 22 of the water cooling heat sink. It flows into the path 21, absorbs the heat generated in the inverter there, and returns it from the outlet 23 of the water-cooled heat sink to the suction port of the pump 31. Similarly, cooling water is taken in from the discharge port of the pump 32, and the cooling water flow path 24
To the inlet side 25, absorbs the heat of the inverter, and returns from the outlet side 26 to the pump 32 inlet.

The pumps 31 and 32 are each driven by an inverter incorporated in the control panel. Therefore, the cooling water circulates only when the pump is operating, that is, when the inverter is operating. In this way, the cooling water flows only when the pump is operating, which saves energy and is rational. If the pumps 31 and 32 break down,
When repairing the pump, the pump can be removed simply by removing the cooling pipe.

In the case of one cooling pipe, as shown in FIG. 9, a check valve 33 and a sluice valve 34 for the pump 31 and a check valve 35 and a sluice valve 36 for the pump 32 are provided at the inlet of the cooling water. Each is required, and the pump 31 also needs to be connected to the suction port of the pump.
And a sluice valve 38 for the pump 32, respectively. In particular, when one pump is operated, for example, when the pump 31 is operated, the pressure at which the pump is started is applied to the check valve 35 as a back pressure, so that the valve body of the check valve is However, since it hits the seat surface strongly, it may make an impact sound. Further, in the case of repairing the pump, it is of course necessary to close the valve when removing the pump.

In the above embodiments, the control panel of the inverter for driving the pump has been described. However, the object to be driven by the control panel is not limited to the pump but can be applied to various devices such as a fan and a compressor. That is. Further, the heat source is not limited to the inverter, but can be widely applied to various heat generating devices such as a pulse width variable power source of a DC brushless motor.

[0027]

As described above in detail, the heat of the water-cooled heat sink is not transferred to the chassis by the structure in which the chassis of the control panel and the heat sink maintain a proper gap. Therefore, no dewdrop is generated on both sides of the chassis. Further, even if a dew drop is generated on the surface of the water-cooled heat sink 2, the water content does not enter the control panel.

Further, since the convex portion for forming the void has an integral structure with the chassis, mounting is easy as it is the same as general mounting. Further, not only is the labor for attaching the piece unnecessary, but the piece itself is not required, which is economical.

Two heat sources are provided on both sides of one water-cooled heat sink.
A control board with a compact structure can be realized by mounting on a base.

Further, since the heat insulating material is attached to the outer peripheral surface of the water-cooled heat sink and the inverter mounting surface, there is no exposed surface of the water-cooled heat sink, so that no dew drop is generated.

Further, since there are two cooling pipes of the water-cooled heat sink, it is possible to individually cope with the two pumps, so that it is not necessary to provide a check valve or a sluice valve in the cooling circuit, and a check valve for starting the pump is not required. There is no noise, and the operation of the sluice valve when removing the pump when repairing is unnecessary.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a control panel according to a first embodiment of the present invention,
(A) is a view seen from the upper surface, and (B) is a view seen from the side.

FIG. 2 is an explanatory view showing an arrangement of a chassis and a heat sink, (A) shows a state in which a spacer is inserted, and (B).
Shows the state in which the spacer is inserted into the bolt.

FIG. 3 is an explanatory diagram in which a bent convex portion is formed on the chassis.

4A and 4B are explanatory views of a control panel provided with a plurality of heat sinks, FIG. 4A being a top view and FIG. 4B being a side view.

FIG. 5 is an explanatory diagram of a control panel according to a second embodiment of the present invention,
(A) is a view seen from the upper surface, and (B) is a view seen from the side.

FIG. 6 is an explanatory diagram showing a structure of a water-cooled heat sink.

7 is a cross-sectional view of the main part of FIG.

FIG. 8 is an explanatory diagram showing a method for cooling a water-cooled heat sink.

FIG. 9 is an explanatory diagram showing a method for cooling a water-cooled heat sink.

10A and 10B are explanatory views of a control panel of a conventional air-cooled heat sink, where FIG. 10A is a top view and FIG. 10B is a side view.

11A and 11B are explanatory views of a control panel of a conventional water-cooled heat sink, in which FIG. 11A is a top view and FIG. 11B is a side view.

[Explanation of symbols]

1 inverter 2 Water-cooled heat sink 3 cover 4 chassis 5 earth leakage circuit breaker 6 Auxiliary relay or control equipment 10 Projection 14 Volts 13,15 Spacer 21, 24 Cooling water flow path 27, 28 insulation A void

Continuation of the front page (56) References JP-A-6-284522 (JP, A) JP-A-2-32597 (JP, A) JP-A-58-159657 (JP, A) Jitsukaihei 3-43739 (JP , U) Actual development Sho 57-15609 (JP, U) Actual development Hei 7-39206 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02B 1/56 H02B 1/28

Claims (3)

(57) [Claims] 1. An inverter and a control device are housed in an enclosure including a cover and a chassis, and a water-cooled heat sink for cooling the inverter is attached to an outer surface of the chassis, the water-cooled heat sink and the enclosure. a spacer provided between said chassis so void is provided between the chassis vessel between said water-cooled heat sink, the gap
Thermal insulation between the water-cooled heat sink and the enclosure.
Control board, characterized in that the rim. 2. An inverter and a control device are housed in an enclosure including a cover and a chassis, and a water-cooled heat sink for cooling the inverter is attached to an outer surface of the chassis, and a chassis of the enclosure is provided. In the chassis, a gap is formed between the water-cooled heat sinks,
Projecting internally from the outside provided with a protrusion which abuts against the rear surface of the water-cooled heat sink, the water heat by the air gap
A control panel characterized in that the sink and the envelope are thermally insulated . 3. A plurality of inverters, a control device, and a water-cooled heat sink that cools the inverter are housed in an enclosure composed of a cover and a chassis, and the plurality of inverters are provided on both sides of the water-cooled heat sink. is fixed to cover the outer periphery of the water-cooled heat sink with a heat insulating material, further, both surfaces stuck insulation of the said water-cooled heat sink the inverter so that the surface of the water-cooling heat sink is not exposed is mounted, said by the heat insulating material Water cooled
A control panel characterized by insulating the surface of the heat sink .