JP2019193569A - Panel board - Google Patents

Abstract

To reduce manufacturing costs and improve ventilation properties.SOLUTION: A bus bar fixing base (4) fixes an N bus bar (1), an L1 bus bar (2) and an L2 bus bar (3), which supply power to each of a plurality of branch switches provided in a panel board, to the panel board. A plurality of insulating walls (5) to insulate the N bus bar (1), L1 bus bar (2) and L2 bus bar (3) from each other are arranged opposite the bus bar fixing base (4) along the direction in which the bus bars extend. Each of the plurality of insulating walls (5) are arranged to be separate from neighboring other insulating walls (5).SELECTED DRAWING: Figure 5

Description

  The present invention relates to a distribution board. In particular, the present invention relates to a distribution board having a structure capable of effectively suppressing thermal secular change of a cabinet accompanying heat generation in the distribution board.

The distribution board includes a cabinet on which a power distribution device such as a main switch or a branch switch is placed and a front cover side of the case is covered with a main body cover. Usually, the cabinet is often made of resin. In a general distribution board, the case has a box shape having a bottom surface and side walls erected around the bottom surface, and an opening for drawing wiring into the panel extends substantially over the bottom surface side. Is provided. (Patent Document 1)
When the distribution board is used, heat is generated by the current flowing through the power distribution equipment as electricity is used. The heat generated from the power distribution device or the like is configured to escape through the opening into the wall surface to which the distribution board is attached.

  On the other hand, in a distribution board that is used by being incorporated in a device, an opening may not be provided on the bottom surface of the case due to installation restrictions. In such a case, the opening position in the distribution board is provided on the side wall side, and the size of the opening is allowed only for the minimum opening for drawing the electric wire into the board. In addition, there is a case where a large opening is not provided in the distribution board in order to prevent dust and foreign matters from entering.

  In such a distribution board, a cabinet is comprised with an iron plate and the generated heat may be dissipated to the circumference by heat conduction, and the temperature rise in a distribution board may be suppressed. (Patent Document 2)

JP-A-9-65517 JP-A-10-108319

  The heat generated in the panel needs to be quickly discharged to the outside of the panel, but if the discharge is delayed and the heat stays, it is affected by the heat at the staying location. Residue in the vicinity of devices or busbars that generate a large amount of heat may be accelerated by thermal degradation over time.

  When the cabinet is made of an iron plate, the heat generated in the panel can be effectively dissipated to the surroundings, but there is a problem that the degree of freedom of forming the distribution board cabinet is lower than that of resin.

  On the other hand, in a distribution board made of resin, if there is a large temperature difference between where heat is accumulated and where it is not, there is a possibility of distortion or discoloration of the cabinet due to the difference in expansion. is there. In resin distribution boards, thermal effects over a long period of time are not preferable.

  Therefore, even in a distribution board that uses a resin cabinet and does not have a large opening hole on the bottom of the case, even if it is used for a long period of time, it prevents local thermal deterioration and is uniform overall. Disclosed is a distribution board having a structure capable of performing efficient cooling and effectively cooling a busbar or the like that generates a large amount of heat.

In order to solve the above-described problems, the distribution board according to the present invention is a distribution board that is used by being attached to a wall surface, and is arranged separately from the wall surface side of the distribution board case attached to the wall surface. A plurality of air introduction grooves, an introduction air mixing portion formed in communication with the plurality of air introduction grooves and recessed inward of the case, and in communication with the inside of the case so that the mixed air can be led out to the inside of the case It is good to comprise so that the mixed air derivation | leading-out part arrange | positioned at the peripheral part of this introduction air mixing part may be formed.
According to the above configuration, since the introduced air is temporarily stored by the introduction air mixing unit, the temperature is made uniform, and the uniform mixed air is led out to the inside of the case. Thus, uniform cooling can be performed as a whole.

  The introduction air mixing section may be arranged on the back surface of the internal unit on which the branch switch housed in the case of the distribution board is placed.

  As a result, the back surface of the internal unit on which the branch switch that occupies a large area in the distribution board can be effectively used, and the size of the introduction air mixing unit corresponding to the size of the internal unit Can be ensured, and the ratio of the introduction air mixing section to the size of the distribution board can be increased.

  In addition, the mixed air lead-out part may be arranged at a corner of an introduction air mixing part formed to be recessed inward of the case so that the mixed air is led out toward the inner unit.

  As a result, it is possible to cool the entire area of the internal unit in which the buses are gathered, so that the buses generating large heat can be effectively cooled.

  According to one aspect of the present invention, while adopting a resin-made cabinet, even in a distribution board that does not have a large opening hole on the bottom surface of the case, even if it is used for a long time, local thermal degradation This is advantageous in that uniform cooling can be performed as a whole, and the buses and the like that generate large amounts of heat can be effectively cooled.

The top view of the distribution board which concerns on one Embodiment of this invention is shown. (A) shows a plan view of the distribution board with the main handle cover and the branch handle cover removed, and (b) shows a perspective view of the distribution board in this state. It is a front view which shows the state which attached the internal unit to the case regarding the said electricity distribution panel. It is a perspective view which shows the structure of an internal unit regarding the said electricity distribution panel. It is a perspective view which shows the structure of the air introduction part by the side of a back surface, an introduction air mixing part, and a mixed air derivation | leading-out part regarding the said electricity distribution panel. It is a perspective view which shows the structure of the air introduction part by the side of a back surface, an introduction air mixing part, and a mixed air derivation | leading-out part regarding the said electricity distribution panel. It is sectional drawing which passes along a branch switch regarding the said distribution board. It is a figure which shows the conventional distribution board. It is a figure which shows the conventional distribution board.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a plan view of a distribution board 1 according to an embodiment of the present invention. 2A shows a plan view of the distribution board 1 with the main handle cover and the branch handle cover removed, and FIG. 2B shows a perspective view of the distribution board 1 in this state. .

  The distribution board 1 includes a case 2, a main body cover 3, a main switch 4, a plurality of branch switches 5, a main handle cover 11, and a branch handle cover 12 (handle cover). The main switch 4 includes a main handle 4a for performing an opening / closing (conduction / cutoff) switching operation. The branch switch 5 includes a branch handle 5a (handle) for performing an opening / closing switching operation. The main switch 4 and the plurality of branch switches 5 are attached to the case 2. The main body cover 3 is attached to the case 2 so as to cover wiring (such as busbars) provided inside the distribution board 1. The main body cover 3 has a first opening window 3a at a position corresponding to the main handle 4a, and a second opening window 3b (opening) at a position corresponding to the plurality of branch handles 5a. The second opening window 3b is provided with a plurality of erection parts 16 at a predetermined interval. Here, the case 2, the main body cover 3, the main handle cover 11, and the branch handle cover 12 are made of resin, but are not limited thereto, and may be made of metal except for the main body cover 3.

  The main body cover 3 is provided with two handle portions 6. The handle 6 is a member for fixing the main body cover 3 to the case 2 and a member for removing the main body cover 3 from the case 2. In addition, in each of the two side surfaces facing each other in the main body cover 3, a recess space for disposing each handle portion 6 is provided. The handle portion 6 is arranged so as to be movable in the space of the concave portion. As described above, by providing the handle portion 6 in the space of the recess, the work of removing the main body cover 3 is facilitated. Thereby, the maintenance work of the distribution board 1 is facilitated.

(Master handle cover)
The main handle cover 11 is attached to the main body cover 3 so as to cover the first opening window 3a. Corresponding convex portions and concave portions are provided around the first opening window 3 a of the main handle cover 11 and the main body cover 3. The main handle cover 11 is fixed to the main body cover 3 by engaging the convex portion and the concave portion. The main handle cover 11 can be attached / detached (opened / closed) by the user's hand from the outside without using a tool.

Note that the main handle cover 11 is not detachable, and may be configured to rotate around a fixed axis and open. However, the detachable main handle cover 11 does not break the shaft or the like and does not require a space for the main handle cover 11 to rotate forward, compared to the rotary type, so the distribution board can be used in a small space. 1 can be used (installed).

(Branch handle cover)
The branch handle cover 12 is a plate-like member and has a rectangular outer shape. Since the branch handle cover 12 is made of resin and has a thin plate shape, it can be elastically deformed. The branch handle cover 12 has a plurality of (here, four) cutouts in the periphery. Here, the cutout has an arc shape, but may have a triangular shape, a quadrangular shape, or an arbitrary shape. The plurality of notches may be formed in the branch handle cover 12 so as to be symmetric with respect to at least one central axis of the branch handle cover 12. For example, when the plurality of notches are formed symmetrically with respect to the vertical center axis, the branch handle cover 12 is branched in the same manner as in the original state even when the branch handle cover 12 is rotated 180 ° with respect to the vertical center axis. The handle cover 12 can be attached to the main body cover 3. The same applies to the case of symmetry with respect to the horizontal central axis and the case of symmetry with respect to the center. The branch handle cover 12 is preferably at least partially transparent or translucent. Thus, even when the branch handle cover 12 is closed (attached), the user can see the state of the branch handle 5a through the branch handle cover 12 from the outside.

  FIG. 3 is a front view showing the distribution board 1 with the internal unit 20 attached to the case 2. The case 2 accommodates the internal structure of the distribution board 1, and an internal unit 20 is accommodated in the case 2 as shown in FIG. The internal unit 20 draws electric power supplied from an external transformer (not shown) of the distribution board 1 by a single-phase three-wire system, and the drawn electric power is set to a voltage of 100 V or 200 V, and a plurality of branch opening and closing shown in FIG. It supplies to each of the container 5 (branch breaker).

  The inner unit 20 (the branch mounting plate 211 in FIG. 4) is formed with a hole to be attached to the case 2, and the hole is used as a screw tightening point. In addition, illustration is abbreviate | omitted about members other than the internal unit 20 which comprises the inside of the electricity distribution panel 1. FIG.

(Main part structure of the internal unit 20)
Next, the structure of the main part of the internal unit 20 will be described with reference to FIG. FIG. 4 is a perspective view showing the structure of the internal unit 20. As illustrated, the internal unit 20 includes a bus bar mat member 210, a branch mounting plate 211, and the branch switch 5. The bus bar mat member 210 is an assembly of an N bus bar 201, an L1 bus bar 202, an L2 bus bar 203, a bus bar fixing base 204, and an insulating wall 205.

  The branch attachment plate 211 is a metal plate for attaching the bus bar mat member 210 and the branch switch 5 to the case 2 (see FIG. 3). The branch mounting plate 211 is formed with recesses, holes and protrusions (not shown) for fixing the bus bar mat member 210 and the branch switch 5 to the branch mounting plate 211. Further, for example, as described above with reference to FIG. 3, the branch mounting plate 211 has a hole for mounting to the case 2. In addition, since the specific shape of the branch attachment plate 211 is arbitrary structures, detailed description is abbreviate | omitted.

  The bus bar mat member 210 is arranged along the shape formed on the branch mounting plate 211, and is fixed with a hole formed in the bus bar mat member 210 (the bus bar fixing base 204 in FIG. 4) as a screw tightening point. 211 is attached. The branch switch 5 is attached to the branch attachment plate 211 in a state where it is connected to the bus mat member 210 attached to the branch attachment plate 211.

(Configuration of bus bar mat member 210)
The bus bar mat member 210 is an assembly of an N bus bar 201, an L1 bus bar 202, an L2 bus bar 203 (a plurality of bus bars), a bus bar fixing base 204, and an insulating wall 205.

  The N bus 201, the L1 bus 202, and the L2 bus 203 are plate-like metal conductors that allow current to flow from the power source side to the branch switch 5, and supply power to each of the branch switches 5. N bus 201, L1 bus 202, and L2 bus 203 have different potentials. The L1 bus 2 is a first voltage electrode, the L2 bus 3 is a second voltage electrode, and the N bus 1 is a neutral electrode.

  The bus bar fixing base 204 fixes the N bus bar 201, the L1 bus bar 202, and the L2 bus bar 203 to the distribution board 1. Insulating wall 205 insulates N bus 201, L1 bus 202 and L2 bus 203 from each other, and is disposed to face bus fixing base 204. The bus bar fixing base 204 and the insulating wall 205 are insulating members made of a resin material.

  A plurality of insulating walls 205 are arranged along the direction in which the bus bars 201 to 203 extend. And each bus-bar 201-203 is pinched | interposed and fixed by the some insulation wall 205 and the bus-bar fixing stand 204 so that it may become mutually parallel in the direction in which it extends. For example, two insulating walls 205 are arranged.

  Each of the plurality of insulating walls 205 is arranged to be separated from other adjacent insulating walls 205. That is, each of the plurality of insulating walls 205 has a structure that covers a part of each of the bus bars 201 to 203. For this reason, compared with the insulating wall of the structure which covers the whole each bus-bar 201-203, since the usage-amount of the structural material (for example, resin) at the time of creation of the insulating wall 205 decreases, the manufacturing cost of the insulating wall 205 is reduced. Can be made. Moreover, since the insulating wall 205 only covers a part of each bus 201-203, the ventilation of the distribution board 1 is improved as compared with the insulating wall having a structure covering the entire bus 201-203. Can do.

(Cooling structure of distribution board 1)
Next, the cooling structure of the distribution board 1 will be described with reference to FIGS.

  In the figure, the x direction is the direction in which the branch switches 5 are arranged side by side, the y direction is the top and bottom direction (up and down direction) of the distribution board 1, and the z direction is the case 2 on the back side and the body cover 3 on the front side. Sometimes the direction is from the back side to the front side.

  On the back side of the case 2, an air introduction groove 21, an introduction air mixing portion 22, and a mixed air outlet portion 23 are formed.

  The air introduction groove 21, the introduction air mixing unit 22, and the mixed air deriving unit 23 are arranged in order from the bottom with respect to the y direction, that is, the vertical direction of the distribution board 1, from the bottom. The mixed air outlet 23 is arranged so that the air rises easily from the lower side to the upper side.

  Four air introduction grooves 21 are formed apart from each other. The air introduction groove 21 is composed of two types, a deep groove and a shallow groove. This is because the introduced air is easily mixed and uniformed in the introduction air mixing section 22 communicating with the air introduction groove 21.

  The mixed air outlet 23 is arranged in a concave shape on the back side of the internal unit 20 on which the branch switch 5 is placed, and has a size corresponding to the size of the internal unit 20.

  The air introduced from the air introduction groove 21 is temporarily stored in the introduction air mixing unit 22, and the temperature is gradually made uniform as it moves upward.

  And the mixed air derivation | leading-out part 23 equivalent to the circuit number of the branch switch 5 is formed in the corner part of the upper periphery of the introduction air mixing part 22. As shown in FIG.

  As shown in FIG. 7, the air led up into the introduction air mixing unit 22 and led into the panel through the mixed air deriving unit 23 passes between the buses near the branch switches 5 to cool the buses. To go.

  In addition, as described above, the insulating wall 205 supporting the busbars has good cooling performance of the busbars in combination with good ventilation through covering only a part of the busbars 201 to 203.

In this way, even in a distribution board that employs a resin cabinet and does not have a large opening hole on the bottom of the case, even if it is used for a long period of time, it is possible to prevent local thermal deterioration and Can cool evenly and can effectively cool large heat generating buses, etc. (Appendix)
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  For example, the number of the air introduction grooves 21 may be increased or decreased by reducing the number of the air introduction grooves 21 from four shown in FIG. 5 to two, for example, six. When the number of grooves is reduced, the width of the grooves may be widened to increase the volume of introduced air. In addition, the depth of the air introduction groove 21 may be provided in multiple stages so that the introduction air mixing unit 22 can be made more uniform by providing an intermediate stage from two stages of deep and shallow. In this case, the size of the knockout portion for introducing the wiring provided between the air introduction grooves 21 and the city may be changed.

  Moreover, although the introduction air mixing part 22 is made into the rectangular shape according to the internal unit 20, it is good also as a shape which is easy to guide introduction air to the mixed air derivation part 23, for example as a trapezoid shape which narrows as it goes upwards.

  In addition, the mixed air outlet 23 is provided corresponding to the branch switch 5, but the width of the mixed air outlet 23 is set for each of the branch switches (for example, every two or every three). Alternatively, the air may be derived from a large area bus at once.

  Further, the positions of the air introduction groove 21, the introduction air mixing portion 22, and the mixed air outlet portion 23 may be provided on the back surface of the main switch 4 as well as on the back surface of the internal unit 20. As a result, in addition to the vicinity of the branch switch 5, the portion where the main switch 4 is arranged also has a cooling effect, and can be uniformly cooled over a wider area in the distribution board 1.

  The present invention can be used for a distribution board.

DESCRIPTION OF SYMBOLS 1 Distribution board 2 Case 3 Main body cover 4 Main switch 5 Branch switch 6 Handle 20 Internal unit 201 N bus 202 L1 bus 203 L2 bus 204 Bus fixing stand 205 Insulating wall 21 Air introducing groove 22 Introducing air mixing part 23 Mixing Air outlet

Claims (3)

A distribution board that is mounted on a wall and used.
On the wall side of the distribution board case attached to the wall surface,
A plurality of air introduction grooves spaced apart from each other;
An introduction air mixing portion formed to be recessed inward of the case in communication with the plurality of air introduction grooves;
A mixed air lead-out portion that communicates with the inside of the case so as to lead the mixed air to the inside of the case, and that is disposed at the peripheral edge of the introduction air mixing portion;
A distribution board characterized in that is formed. The introduction air mixing unit is
2. The distribution board according to claim 1, wherein the distribution board is disposed on a back surface of the internal unit on which the branch switch housed in the case of the distribution board is placed. The mixed air outlet part is
Arranged in the corner of the introduction air mixing part that is recessed in the case,
The distribution board according to claim 1, wherein the mixed air is led out toward the inner unit.

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