JP2000175459A - Inverter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a dustproof and waterproof structure using a set of pack ing material by facing the split face of a case against the inverter body section side, when the operating panel section contained in a splittable box-type case is fixed to the inverter body section. SOLUTION: A box-type case for containing an operating panel section comprises a rectangular prism operating panel case 31 having one open side, and an operating panel bottom plate 32 for supporting an operating panel board 25 and having a rectangular hole for receiving a connector 25a on the operating panel side. The box type case can be split into the operating panel case 31 and the operating panel bottom plate 32. When the operating panel section is fixed to a body case 21, the split face of the operating panel case 31 and the operating panel bottom plate 32 is made to face the body case 21 side. According to the structure, a dustproof and waterproof structure can be achieved simultaneously for the gap between the operating panel case 31 and the operating panel bottom plate 32 and the gap between the operating panel section and the body case 21, using a set of packing material 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof and waterproof inverter device.

[0002]

2. Description of the Related Art FIG. 3 is a typical circuit diagram of an inverter device of this type.
Reference numeral 2 denotes an inverter device, and 3 denotes an electric motor as a load fed from the inverter device 2.

The inverter device 2 is formed by a known technique, and includes a diode rectifier circuit 11 for rectifying the voltage of the AC power supply 1, a smoothing capacitor 12 for smoothing the output voltage of the diode rectifier circuit 11, and a smoothing capacitor 12. An inverter 13 for converting the voltage between both ends into an alternating current;
A control circuit 14 for controlling the output of the inverter 13 to an alternating current of a desired voltage and frequency in order to control the speed of the inverter 13, and an operation panel 15 for operating and displaying the operation state of the inverter device 2 via the control circuit 14. ing.

Depending on the mechanical equipment on which the inverter device 2 and the electric motor 3 are installed, the operation panel 15 shown in FIG.
2, an inverter 13 and a control circuit 14 may be integrated with the inverter body, and the connection between the control circuit 14 and the operation panel 15 may be made by an extension cable to operate the inverter body. Panel 1
5 may be arranged separately.

Further, as a required specification from the mechanical equipment, the inverter device 2 may be required to have a dustproof and waterproof structure. FIG. 4 is a schematic conceptual sectional view showing a conventional example of a dustproof and waterproof structure of the inverter device 2 shown in FIG.

In FIG. 4, reference numeral 21 denotes a main body case that covers the inverter main body, 22 denotes an upper case of the operation panel portion,
Denotes a lower case of the operation panel portion, and the operation panel 15 has a structure that can be divided into an upper case 22 and a lower case 23. Reference numeral 24 denotes a control circuit board on which the control circuit 14, which is one of the above-described inverter main bodies, is mounted. Reference numeral 24a denotes a main body-side connector provided in the control circuit 14 through a square hole provided in the main body case 21 as illustrated. 25 is the operation panel 1
5, an operation panel board 25a on which electronic components, push buttons, etc. are mounted, and an operation panel board 25a for connecting the operation panel 15 and the main body side connector 24a through a square hole provided in the lower case 23 as shown in the figure. , A packing material for sealing a space between one surface of the main body case 21 and the lower case 23, and 27 a packing material for the upper case 22.
Is a packing material for sealing a joint portion between the lower case 23 and the lower case 23. The operation panel substrate 25 is supported by the lower case 23 as shown in FIG. The inverter main body other than the portion in contact with the lower case 23 of the inverter main body has a dustproof and waterproof structure by the main body case 21 and the like by a known technique.

[0007]

According to the conventional dust-proof and waterproof structure of the operation panel shown in FIG. 4, packing members 26 and 27 having different shapes are required.
Particularly, as shown in FIG. 4, a step is provided on each of the opposing surfaces connecting the upper case 22 and the lower case 23, and a part of the step is sealed with a packing material 27. There is also a problem that the structure of the surface facing the device becomes complicated. An object of the present invention is to provide an inverter device having a dustproof and waterproof structure that solves the above problems.

[0008]

According to the present invention, a DC voltage obtained by converting an input AC voltage by a rectifier circuit and a smoothing capacitor is converted into an AC voltage having a desired voltage and frequency by an inverse conversion circuit, and power is supplied to a load. And an operation panel for operating and displaying the operation state of the inverter main body. The operation panel can be mounted on one surface of the inverter main body and can be separated from the inverter main body. In the inverter device, the operation panel section is formed of a box-shaped case that can be divided and an operation panel section housed in the case, and when the operation panel section is mounted on one surface of the inverter body section, The divided surface of the box-shaped case is made to face the inverter main body side, and a packing material is provided between the box-shaped case and one surface of the inverter main body. Characterized in that it Rifutome.

According to the present invention, the operation panel section includes one
A set of packing materials can be used to provide a dust-proof and waterproof structure, and the end face of the opening of the box-shaped case and one surface of the inverter body may be flat as described later.

[0010]

FIG. 1 is a schematic conceptual sectional view of a dustproof and waterproof structure of an inverter device 2 shown in FIG. 3 showing an embodiment of the present invention, and is the same as the conventional example shown in FIG. Those having functions are denoted by the same reference numerals.

That is, in FIG.
1, a control circuit board 24, a main body side connector 24a, an operation panel board 25, an operation panel side connector 25a, an operation panel case 31 having an opening on one surface of a rectangular body, and an operation panel board 25. An operation panel bottom plate 32 having a square hole for the side connector 25a;
The gap between the opening end face of the operation panel case 31 and the main body case 21 is sealed with a packing material 33. The box-shaped case of the operation panel portion can be divided into an operation panel case 31 and an operation panel bottom plate 32. When the operation panel portion is mounted on the main body case 21,
The operation panel case 31 and the operation panel bottom plate 32 are mounted so that the divided surface, that is, the opening side of the operation panel case 31 faces the main body case 21 side.

As a result, the gap between the divided surfaces of the operation panel case 31 and the operation panel bottom plate 32 and the dustproof and waterproof between the operation panel portion and the main body case can be simultaneously performed by one packing material 33.

FIG. 2 is a detailed perspective view of the operation panel section of the present invention, and FIG. 2A is an external view of the operation panel section as viewed from the bottom side. As shown in the exploded view shown in FIG. 2), the operation panel side connector 25 a installed on the back side of the operation panel board 25 is made to penetrate through a square hole of the operation panel bottom plate 32, and the operation panel board 25 is
4 and fixed to the operation panel bottom plate 32.
1 opening inside (inside the side wall of the operation panel case 31)
A box-shaped case is formed by fitting the operation panel bottom plate 32 into the case.

In FIG. 1, steps are provided at the bottom end face of the operation panel case 31 and the outer peripheral portion of the operation panel bottom plate 32 to position the operation panel case 31 and the operation panel bottom plate 32. But operation panel case 3
A step may be provided only on the end face of the opening 2 and a plate-shaped operation panel bottom plate 32 may be fitted therein. Alternatively, a projection may be provided inside the side wall of the operation panel case 31 and the plate-shaped operation may be performed. The panel bottom plate 32 may be fitted.

When the operation panel is integrated with the inverter main body, a hollow packing material as shown in FIG. 2B is provided between the end face of the opening of the operation panel case 31 and one surface of the main body case 21. 33 is inserted, and FIG.
2B, the operation panel unit shown in FIG. 2A may be fixed to the main body case 21 using through holes formed in two corners of the operation panel case 31.

The material of the packing material 33 is generally a sponge material, a rubber material or the like. Alternatively, a silicon material or the like may be applied as the packing material 33 to the opening end surface of the operation panel case 31.

[0017]

According to the present invention, when the inverter device including the inverter main body and the operation panel is made to have a dustproof and waterproof structure, the operation panel is made to have a dustproof and waterproof structure by using a set of packing materials. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic conceptual sectional view of a dustproof and waterproof structure of an inverter device showing an embodiment of the present invention.

2 is a partial detailed perspective view of FIG. 1, FIG. 2 (a) is an external view, and FIG. 2 (b) is an exploded view.

FIG. 3 is a typical circuit configuration diagram of an inverter device.

FIG. 4 is a schematic conceptual sectional view of a dustproof and waterproof structure of an inverter device showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... AC power supply, 2 ... Inverter apparatus, 3 ... Electric motor, 11
... Diode rectifier circuit, 12 ... Smoothing capacitor, 13
... Inverter, 14 ... Control circuit, 15 ... Operation panel, 2
1 ... body case, 22 ... case, 23 ... lower case, 24
... control circuit board, 25 ... operation panel board, 26, 27 ...
Packing material, 31: operation panel case, 32: operation panel bottom plate, 33: packing material, 34: screw.

Claims (1)

[Claims] An inverter body for converting an input AC voltage by a rectifier circuit and a smoothing capacitor into a DC voltage having a desired voltage and frequency by an inverse conversion circuit and supplying power to a load; An operation panel for operating and displaying an operation state of the main body; wherein the operation panel can be mounted on one surface of the inverter main body and can be separated from the inverter main body; Is formed of a box-shaped case that can be divided and an operation panel portion housed in the case. When the operation panel portion is mounted on one surface of the inverter body, the divided surface of the box-shaped case is It is characterized by sealing the space between the box-shaped case and one surface of the inverter body with a packing material so as to face the inverter body. The inverter device.