JPH11168809A - Distribution panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify fitting work of horizontal bus-bars and vertical bus-bars to be stored in a bus-bar chamber. SOLUTION: This distribution panel is provided with a first distribution chamber 20 for circulating cooling air at the side part of the first unit camber 16a for inserting a lower heating unit, a first wind tunnel 24 for circulating cooling air from a first unit chamber 16a to a bus-bar chamber 22 at the rear part of the first unit camber 16a, a second distribution chamber 21 for circulating cooling air at the side part of a second unit camber 17a for inserting a high heating unit, and a second wind tunnel 25 for circulating the cooling air from the second unit chamber 17a to the bus-bar camber 22, at the rear part of the second unit chamber 17a. At a ceiling plate 16d of the first wind tunnel 24 upper part, a capacity regulating device 1 consisting of an air hole 16e for permitting the cooling air to be flowed into the bus-bar chamber 22 from the first wind tunnel 24, and a regulation plate 2 for regulating the opening degree of the air hole 16a is formed at the ceiling plate 16d. Consequently, since the wind tunnel is not formed at the bus-bar chamber 22, the fitting work of horizontal bus-bars or vertical bus-bars is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the cooling of a switchboard composed of a plurality of stacked low-heat units such as main circuit devices and high-heat units such as inverters.

[0002]

2. Description of the Related Art Conventionally, a switchboard is constructed as shown in FIGS. In the figure, reference numeral 11 denotes a switchboard, which is a bus unit 12 that partitions the inside of the switchboard 11 into a front part and a rear part.
Are arranged from the upper part to the lower part of the switchboard 11.
The busbar unit 12 is configured by covering a vertical busbar 13 in which two thin conductive plates are formed in a convex shape with an insulating cover and supporting the vertical busbar 13 with a support member 14. 15 is a shelf board,
The shelf board 1 is attached to the front and rear portions of the switchboard 11.
5, the inside of the switchboard 11 is vertically partitioned to form a plurality of first unit chambers 16a and a plurality of second unit chambers 17a. Reference numerals 16b and 17b denote doors that cover the front surfaces of the first and second unit chambers 16a and 17a, and are attached to the frame of the switchboard 11 so as to be openable and closable. The lowermost doors 16b, 17b of the first and second unit chambers 16a, 17a are provided with ventilation holes 16c, 17c. FIG. 3 shows the first
The front view of the unit 16a side is shown, and the reference numerals in parentheses indicate the reference numbers of the second unit 17a side. The first
Heat generating unit 18a housed in the unit room 16a
The main circuit devices such as a circuit breaker and an electromagnetic switch, an overcurrent relay, and the like are mounted on a common frame 18b for each unit circuit, and the devices are integrated. Reference numeral 18c denotes a ventilation hole provided on a side portion of the frame 18b, a high heat generating unit 19a housed in the second unit chamber 17a includes a cooling structure having cooling fins to which semiconductor elements are attached, and an An inverter device or the like on which components are mounted is mounted on a common frame 19b for each unit circuit, and the above-described devices are integrated. Reference numeral 19c denotes a ventilation hole provided on a side portion of the frame 19b, and reference numeral 20 denotes a first wiring room provided on a side portion of the first unit chamber 16a. A door 20a is provided, and a ventilation hole 20b is provided in a side wall of the first wiring chamber 20 facing the first unit chamber 16a. Reference numeral 21 denotes a second wiring room provided on the side of the second unit room 17a. A door 21a is provided on the front surface of the second wiring room 21 so as to be openable and closable.
A ventilation hole 21b is provided in a side wall of the second wiring chamber 21 facing the second wiring chamber 21. Reference numeral 22 denotes a bus room provided above the switchboard 11. A horizontal bus 23 is disposed in the bus room 22, and an end of the vertical bus 13 of the bus unit 12 is connected to a wind tunnel 26.
And is connected to the horizontal bus bar 23. A door 22a is provided on the front surface of the bus bar room 22, and a discharge port 22b is formed on the front surface of the door 22a. Reference numeral 24 denotes a first wind tunnel. The first wind tunnel 24 is provided in the back of the left side of the low heat generation unit 18a, and has a ventilation hole 24 communicating from the low heat generation unit 18a to the first wind tunnel 24.
a is provided on the side wall of the first wind tunnel 24. 25 is a second wind tunnel, which is provided at the back of the high heat generation unit 19a,
A ventilation hole 25 a communicating from the high heat generation unit 19 a to the second wind tunnel 25 is provided on a side wall of the second wind tunnel 25.
Reference numeral 26 denotes a wind tunnel provided in the bus chamber 22, one end of which is connected to the second wind tunnel 25, and the other end of which is provided with a cooling fan 27 so as to discharge cold air from the second wind tunnel 25 to the outside. It is. Low heat generation unit 1 of switchboard thus configured
The cooling of the cooling air 8a is performed by cooling the cold air flowing from the air inlet 16c of the door 16b into the lower air hole 20 provided in the side wall of the first wiring chamber 20.
b flows into the wiring chamber 20. The cool air that has flowed into the first wiring chamber 20 is supplied to the upper ventilation hole 20 b of the first wiring chamber 20.
The air flows through the low heat generating unit 18a through the vent 18c of the frame 18b of the low heat generating unit 18a inserted into each first unit chamber 16a, flows into the first wind tunnel 24 from the vent 24a, and flows into the first wind tunnel. The cooling chamber 24 is cooled by natural ventilation that enters the bus bar room 22 at the top of the chamber 24 and is discharged to the outside through the outlet 22b of the door 22a of the bus bar room 22. When the cooling fan 27 is driven to cool the high heat generation unit 19a, the lower air hole 17c of the door 17b of the second unit chamber 17a is cooled.
The cool air flowing from the second heat generating unit 19a passes through the ventilation holes 21b provided in the side wall of the second wiring chamber 21 and through the ventilation holes 19c of the frame 19b of the high heat generation unit 19a inserted into the respective second unit chambers 17a. It circulates and flows into the second wind tunnel 25 from the ventilation hole 25 a, and cool air is discharged to the outside from the wind tunnel 26 provided in the bus bar room 22 to cool by forced ventilation.

[0003]

However, in the conventional switchboard 11, the cool air flowing through the low heat generating unit 18a is discharged from the door of the bus room through the bus room and the high heat generating unit 19 is discharged.
The cool air which has flowed through a is discharged outside through a wind tunnel 26 provided in the bus room. For this reason, a wind tunnel must be provided in the bus room, which complicates the structure, and the work of mounting the horizontal bus or the vertical bus is complicated. Therefore, an object of the present invention is to make it possible to easily attach a horizontal bus or a vertical bus without providing a wind tunnel in the bus room.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a first unit chamber in which a low heat generation unit is inserted on the front side of a switchboard, and the first unit chamber is provided on a side of the first unit chamber. A first wiring chamber for circulating cool air through the low heat generating unit, and a first wiring chamber for circulating cool air discharged from the first unit chamber at a rear portion of the first unit chamber to a bus room provided above a switchboard. A wind tunnel, a second unit chamber for inserting a high heat generation unit on the rear side of the switchboard, a second wiring chamber for flowing cool air to the high heat generation unit on a side of the second unit chamber, A second wind tunnel through which the cool air discharged from the second unit chamber flows to the bus room at the rear of the second unit room, and the high heat generation unit and the low heat generation unit are cooled by a cooling fan provided in the switchboard. Switchboard A bus chamber in which the cool air flowing through the low heat generating unit flows in from a first wind tunnel and the cool air flowing through the high heat generating unit flows in from a second wind tunnel; A ventilation hole provided on the ceiling plate above the wind tunnel to allow cool air to flow into the bus room from the first wind tunnel, and a ventilation hole provided on the ceiling plate of the first wind tunnel, An air volume adjusting device including an adjusting plate for adjusting the degree of opening is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a switchboard showing an embodiment of the present invention. FIG. 2 is a diagram of a switchboard according to an embodiment of the present invention.
FIG. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 3 to 5 are denoted by the same reference numerals, and detailed description will be omitted. Although the basic configuration of the switchboard of the present invention is almost the same as that of the conventional switchboard, the structure of the bus room and the flow structure of the cool air are different from those of the conventional switchboard. The bus room has a low heat generation unit 18
a into the first wind tunnel 24, the first wind tunnel 2
4 and the cold air flowing into the second wind tunnel 25 through the high heat generating unit 19a, and flowing into the second wind tunnel 25 into the bus chamber 22, the cooling fan provided in the bus chamber 22. 27 is configured to discharge cold air to the outside. Cooling air is circulated through a ceiling plate 16d above the first wind tunnel 24, a ventilation hole 16e provided in the ceiling plate 16d, and for allowing cool air to flow from the first wind tunnel 24 into the bus chamber 22; Adjustment plate 2 provided on the ceiling plate 16d of the wind tunnel 24 for adjusting the degree of opening of the ventilation hole 16e.
And a low heat generation unit 1
The amount of cold air flowing through the bus bar 8a into the bus chamber 22 is adjusted. 2a is a ventilation hole provided in the adjustment plate 2. Next, the cooling operation of the switchboard thus configured will be described. FIG. 2 shows a state in which the amount of air flow of the air volume adjusting device is minimized. From this state, cooling fan 2
7 drives the cold air into the door 1 of the second unit chamber 17a.
7b, and flows into the second wiring chamber 21. The cool air that has flowed into the second wiring chamber 21 passes from the ventilation hole 21b of the second wiring chamber 21 through the ventilation hole 19c of the frame 19b of the high heat generation unit 19a inserted into each of the second unit chambers 17a. Flows into. The cool air that has passed through the high heat generation unit 19a is supplied to the second wind tunnel 25.
Flows into the second wind tunnel 25 from the ventilation hole 25a of the first chamber 25 and flows into the busbar chamber 22. Also, the door 1 of the first unit room 16a
The cold air flowing from the ventilation hole 16c of the low heat generation unit 18a inserted into the first unit chamber 16a
The air flows into the low heat generation unit 18a through the ventilation hole 18c of the 8b. The cool air flowing through the low heat generation unit 18a flows into the first wind tunnel 24 from the ventilation hole 24a. The cool air flowing into the first wind tunnel 24 is cooled by the ceiling plate 16 of the first wind tunnel 24.
Then, the air flows into the bus bar room 22 through the adjusting plate 2a through the ventilation hole 16e provided in d. For this reason, the low heat generation unit 18
a, the amount of the cool air flowing from the first wind tunnel 24 is restricted by the air flow control device 1 including the ventilation holes 16 e provided in the ceiling plate 16 d of the first wind tunnel 24 and the adjusting plate 2 so that the amount of the cool air is restricted. It flows into the busbar room 22. Therefore, the second heat tunnel 2 flows through the high heat generation unit 19a flowing into the bus chamber 22.
The amount of inflow of the cool air flowing in from the fifth airflow unit 5 is larger than the amount of inflow of the cool air flowing from the first wind tunnel 24 through the low heat generation unit 18a. Thus, a lot of cool air flows through the high heat generation unit 19a, and the high heat generation unit 19a is reliably cooled.
Now, to increase the air volume passing through the low heat generation unit,
The door 22a of the bus bar 22 is opened, and the adjustment plate 2 is rotated to increase the amount of overlap between the ventilation hole 16e of the ceiling plate 16d and the ventilation hole 2a of the adjustment plate 2, thereby increasing the amount of air flow. Thus, the cold air flowing through the low heat generation unit is
And a bus chamber in which the cool air flowing through the high heat generating unit flows in from the second wind tunnel 25 so that the flow rate of the cool air flowing through the low heat generating unit can be adjusted. Therefore, even if the high heat generation unit 19a and the low heat generation unit 18a are housed in one switchboard, the high heat generation unit 19a and the low heat generation unit 18a can be reliably cooled. Therefore, since there is no need to provide an air tunnel in the bus chamber 22, the structure is simplified, and the work of attaching the horizontal bus or the vertical bus is simplified.

[0006]

As described above, since the switchboard according to the present invention does not have a wind tunnel in the bus room, the work of attaching a horizontal bus or a vertical bus can be easily performed.

[Brief description of the drawings]

FIG. 1 is a front view of a switchboard showing an embodiment of the present invention.

FIG. 2 is a diagram of a switchboard showing an embodiment of the present invention, wherein (a)
3 is a cross-sectional view along the line AA in FIG. 1, and FIG. 3B is a cross-sectional view along the line BB in FIG.

FIG. 3 is a front view of a conventional switchboard.

FIG. 4 is a sectional view taken along the line CC of FIG. 3;

FIG. 5 is a sectional view taken along the line DD of FIG. 4;

[Explanation of symbols]

1 air volume control device, 2 adjustment plate, 2a vent, 1
6a first unit room, 16d ceiling panel, 16e
Vent hole, 17a 2nd unit room, 20 1st wiring room, 21 2nd wiring room, 22 busbar room, 24
First Wind Tunnel, 25 Second Wind Tunnel

Claims (1)

[Claims] A first unit chamber into which a low heat generating unit is inserted on the front side of a switchboard; a first wiring chamber through which cold air flows through the low heat generating unit at a side of the first unit chamber; A first wind tunnel for passing cool air discharged from the first unit room to a bus room provided above the switchboard at a rear portion of the first unit room, and a high heat generating unit inserted at a rear side of the switchboard. A second unit room, a second wiring room for circulating cool air to the high heat generation unit on a side portion of the second unit room, and a second unit room discharged from the second unit room to a rear portion of the second unit room. A second wind tunnel for flowing the cold air to the bus room, wherein the cooling fan provided on the switchboard cools the high heat generation unit and the low heat generation unit. Wind tunnel A bus room in which the cool air flowing through the high heat generation unit is allowed to flow in from the second wind tunnel, and provided on the ceiling plate above the first wind tunnel, An air volume adjusting device including a ventilation hole for allowing cool air to flow from the first wind tunnel into the bus chamber and an adjusting plate provided on a ceiling plate of the first wind tunnel and adjusting an opening degree of the ventilation hole; Switchboard characterized by the following.