JP6213150B2 - Inverter - Google Patents

Description

  The present invention relates to a power conditioner, and more particularly to the structure of the casing.

  Conventionally, in patent document 1, it has proposed about the structure of the current collection box interposed between a solar cell and a power conditioner. In this current collection box, in order to cover both sides on the back side when the back surface is attached to the outer wall, a decorative cover (see paragraph 0057 of the same document, reference numeral 43 in FIGS. 5, 6, 9, 11, and 12) is used. It is attached to the housing with screws (see reference numeral 44).

JP 2012-244770 A

  By the way, the power conditioner is provided with a terminal block for drawing and connecting a large number of various wirings (AC wiring, DC wiring, etc.) from the outside into the housing. Such terminal blocks are provided with cover members for shielding and protecting the terminal blocks and various wirings around the terminal blocks from the outside after connection work of various wirings at the time of installation of a power conditioner or the like. Things have been done. In order to make such a cover member detachable, when trying to develop an attachment method using an engagement means using an engagement piece instead of a screwing means, a new increase in the number of parts is required. In order to prevent the occurrence of a step between the casing and the cover member and prevent the appearance of the entire power conditioner from being impaired by preventing the occurrence of a step between the casing and the cover member, for example. It is considered that the engaging piece is formed integrally with the member.

  However, in order to integrally form the engaging piece, when the engaging piece protruding from the wall of the housing is formed by bending the remaining part of the predetermined shape formed by partially punching the housing wall, the housing The punching opening remains in the wall of the punching hole, and the result of allowing insects and the like to enter from the punching opening is caused.

  The present invention has been made in view of such circumstances, and an object of the present invention is to form the engaging means when the cover member is detachably attached to the housing body using the engaging means. Therefore, an object of the present invention is to provide a power conditioner that can block the presence of an opening that occurs in the housing main body at the same time as the cover member is mounted, thereby preventing insects and the like from entering the housing main body.

  In order to achieve the above object, in the present invention, the following specific items are provided for a power conditioner including a casing and a wiring terminal block. That is, as the casing, a casing main body in which a recess is formed in a part of the periphery by a partition wall, and a cover member that is detachably attached to the partition wall by an engaging means to shield the recess. The engagement means includes an engagement piece formed on the partition wall and an engagement piece formed on the cover member so as to engage with the engagement piece. The partition wall engaging piece is integrally formed in a state of projecting from the partition wall by stamping a sheet metal constituting the partition wall. And, as the engagement piece of the cover member, the cover member is formed on the partition wall by the punching process in the mounted state in which the cover piece engagement piece and the partition wall engagement piece are engaged with each other. It is set as the structure provided with the shielding part of the magnitude | size which can be covered and covered with the processed hole (Claim 1).

  In the case of the present invention, when the cover member is detachably attached to the concave portion formed in a part of the housing body using the engaging means, it occurs on the partition wall to form the partition wall engagement piece. By mounting the cover member, it is possible to cover and close the processed hole with the shielding portion of the engaging piece of the cover member simultaneously with the mounting. As a result, it is possible to reliably prevent insects and the like from entering the inside of the housing body through the processing holes.

  In the power conditioner of the present invention, as a recess, a partition wall is formed by a partition wall including a rising wall that rises upward at a lower corner of the housing body and a top wall that extends in the horizontal direction from the upper end of the rising wall. It is assumed that the cover member is formed in an L shape in cross section with a bottom plate portion and a side plate portion extending upward from an end portion of the bottom plate portion. When mounted on the body body, the overall shape may be rectangular (claim 2). By doing so, it is possible to configure a power conditioner having a good overall appearance with a rectangular shape while including a recess formed by the partition wall and a cover member covering the recess.

  Further, in the power conditioner of the present invention, the recess is constituted by a wiring connecting portion provided with a terminal block inside, and a space for performing the wiring connecting work by releasing the engaging means and removing the cover member. (Claim 3). By doing in this way, the above effect | action can be acquired in the power conditioner provided with the wiring connection part and the cover member which covers this.

  As described above, according to the power conditioner of the present invention, when the cover member is detachably attached to the recess formed in a part of the housing body using the engaging means, the partition wall is engaged. By mounting the cover member, the processing hole that occurs in the partition wall due to the formation of the piece can be covered and closed by the cover of the engaging piece of the cover member simultaneously with the mounting. This makes it possible to reliably prevent insects and the like from entering the inside of the housing body through the processing holes.

  In particular, according to the power conditioner of the second aspect, the concave portion includes a rising wall that rises upward at the lower corner portion of the housing body, and a ceiling wall portion that extends horizontally from the upper end of the rising wall. The cover member is formed into a L-shaped cross section with a bottom plate portion and a side plate portion extending upward from an end portion of the bottom plate portion. When the cover member is mounted on the housing body, the overall shape is rectangular, so that the overall shape is rectangular while the concave portion formed by the partition wall and the cover member covering the concave portion are provided. A good power conditioner can be configured.

  Further, according to the power conditioner of the third aspect, the concave portion is constituted by a wiring connecting portion provided with a terminal block therein, and the wiring connecting operation is performed by releasing the engaging means and removing the cover member. By adopting a configuration in which a space for this is formed, the effect described above can be obtained in the power conditioner including the wiring connection portion and the cover member covering the wiring connection portion.

Fig.1 (a) is the perspective view seen from the front side of the power conditioner which concerns on embodiment of this invention, FIG.1 (b) is the perspective view seen from the back side of the power conditioner. It is the disassembled perspective view seen from the front side of the state which removed the front cover of the power conditioner of FIG. It is the disassembled perspective view seen from the front side of the state which removed the wiring cover, the display part, and the insect-proof sheet | seat from the inside of the power conditioner of FIG. It is a partial expansion perspective view which shows the procedure of the 1st step for mounting | wearing a wiring cover with respect to a wiring connection part. It is the partial expanded bottom view explanatory drawing which looked at the wiring connection part and the removed wiring cover from the bottom face side of a housing | casing. It is the partial expansion side explanatory view which looked at the wiring connection part and the removed wiring cover from the right side of the case. FIG. 7A is a diagram corresponding to FIG. 6 showing the procedures of the first step of FIG. 4 and the second step of FIG. 8, and FIG. 7B shows a state in which the wiring cover is attached to the wiring connecting portion. FIG. 7 is a diagram corresponding to FIG. 6. It is a partial expansion perspective view which shows the procedure of the 2nd step for mounting | wearing a wiring cover with respect to a wiring connection part. It is a partial expansion perspective view of the state where the wiring cover was attached to the wiring connection part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an appearance of a power conditioner according to an embodiment of the present invention. This power conditioner is used, for example, to connect a photovoltaic power generation unit to a commercial power system, and its rear side (see FIG. 1B) is installed in a wall-mounted state on an indoor or outdoor wall surface. It has become so. In this embodiment, an indoor installation type is shown, and in the case of an outdoor installation type, measures against rain and the like are further taken. Inside the power conditioner is a converter that rectifies and boosts the generated power supplied from the photovoltaic power generation unit, and converts the output of this converter into AC power that is connected to the commercial power system for output. Equipment that should normally be provided to fulfill the function as a power conditioner such as an inverter. In addition, illustration of the detail of these apparatuses is abbreviate | omitted in drawing. Further, in the following description, description will be made using up and down, left and right, or front and rear, based on a wall hanging state (the state of FIG. 1A).

  The inverter is provided with a casing 1 having a predetermined thickness and a rectangular overall shape when viewed from the front, and a front cover 3 covering the front opening of the casing 1. A rear opening 11 (see FIG. 1B) for drawing various wirings that penetrate through the wall surface is opened. Specifically, as shown in FIG. 2, the housing 1 includes a housing body 2 and a wiring cover 4, and the overall shape is rectangular with the wiring cover 4 attached to the housing body 2. It is configured to be. The casing main body 2 includes a peripheral frame 20 including a top wall 21, a right side wall 22, a left side wall 23, a bottom wall 24, a partition wall 50 described later, and the like. Is configured in a box shape opened. A part of the casing body 2 in the circumferential direction, specifically, a lower right corner portion is partitioned by the partition wall 50 so as to be recessed inward, and a wiring connection portion 5 (see FIGS. 2 and 3) as a recess is formed. A wiring cover 4 is formed and attached as a cover member having an L-shaped cross section so that the wiring connection portion 5 is shielded and protected, and the entire shape of the housing 1 is rectangular. Has been. The front cover 3 and the wiring cover 4 are both detachable, but the front cover 3 covers both front surfaces with the wiring cover 4 attached to the housing body 2. The wiring cover 4 cannot be attached or detached unless the front cover 3 is removed. In other words, by preventing the wiring cover 4 from being removed alone, the wiring cover 4 is prevented from being accidentally or unintentionally removed. Further, an inverted L-shaped insect-proof sheet 6 is attached to the upper side and one side of the wiring connection portion 5 so as to protrude forward, and by attaching the front cover 3, it comes into contact with the back surface of the front cover 3. Thus, the space on the wiring connection portion 5 side and the space on the inner side of the housing body 2 are partitioned and blocked. In the figure, reference numeral 7 denotes a display unit substrate including a display monitor. The display unit substrate 7 is fixed to the housing body 2 so that the display monitor faces the outside from the window opening 31 of the front cover 3. Yes.

  As shown in FIG. 4, the wiring cover 4 is formed by a side plate portion 41 and a bottom plate portion 42 having a L-shaped cross section, and is an engaging claw that protrudes upward from the upper edge of the side plate portion 41. 43, and two engagement pieces 44, 44 projecting upward from the edge position of the bottom plate portion 42. Reference numeral 421 (see also FIG. 5) in FIG. 4 is a perforable portion whose periphery is partitioned by a cut line (weak line), and various wirings through the back opening 11 (see FIG. 1B). In addition to the pull-in, for example, if the holeable portion 421 is separated from the bottom plate portion 42 by prying it with a minus driver, through holes for drawing various wires into the wiring connecting portion 5 are formed also from the bottom surface side. ing. Further, reference numeral 422 in the figure is a stepped portion for fitting an edge of the front cover 3, and reference numeral 423 is a screw hole for coupling with the front cover 3.

  On the other hand, as shown in FIGS. 5 and 6, the wiring connection portion 5 rises upward from the right end of the bottom wall 24 and the top wall portion 51 extending in the horizontal direction from the lower end of the right side wall 22 of the housing body 2. This is a space defined by an inverted L-shaped partition wall 50 formed of a wall 52. A terminal block 81 and connectors 82 are installed on the top surface side of the wiring connection portion 5 (the front end side of the top wall portion 51), and various wirings (DC wiring, AC wiring, etc.) are provided in the wiring connection portion 5. The connection work with the terminal block 81 and the connectors 82 is possible by drawing. An engagement slit 53 is formed at a predetermined position on the right side wall 22 side of the top wall portion 51 so that the engagement claw 43 of the wiring cover 4 can enter and engage, while the lower end side position of the rising wall 52 is formed. The front and rear engagement pieces 54 and 54 (see also FIG. 4) that can be engaged with the engagement pieces 44 and 44 of the wiring cover 4 protrude toward the space inside the wiring connection portion 5. Is formed. Here, each engagement piece 54 is formed integrally with the rising wall 52 by a so-called precision sheet metal working method. Specifically, a method for forming the engagement piece 54 will be described in detail. First, the engagement piece 54 is formed from a rectangular portion 541 (see FIG. 6) at a predetermined position of a thin plate material (sheet metal) for forming the rising wall 52. The remaining portion 543 excluding the shape portion 542 is cut off by punching, and then the remaining shape portion 542 is bent at a right angle by bending to form an engagement piece 54 protruding rightward from the rising wall 52. The As a result, a machining hole 521 having a size corresponding to the rectangular portion 541 remains in the rising wall 52.

  Here, the relationship between the engagement claw 43 of the wiring cover 4 and the engagement slit 53 on the partition wall 50 side will be described. The engagement slit 53 is longer than the entire length of the engagement claw 43 in the front-rear direction by a predetermined amount. A top wall 51 having a set length and a width corresponding to the plate thickness of the engaging claw 43, and the groove gap K 1 (see FIG. 6) of the engaging claw 43 forms the engaging slit 53. It is set to correspond to the plate thickness. Then, after the engaging claw 43 is inserted into the engaging slit 53, the wiring cover 4 is moved to the back (backward) so that the slit edge of the engaging slit 53 enters between the groove gaps K1 and engages with each other. As a result, the position of the wiring cover 4 is fixed in a state in which the wiring cover 4 is prevented from moving vertically and horizontally. In this fixed position (attached state), at the same time, each of the engagement pieces 44 on the side of the wiring cover 4 and each of the engagement pieces 54 on the side of the partition wall 50 described below are engaged with each other to connect the wiring cover 4. It is in a state where the movement of up and down, left and right is blocked.

  The relationship between each engagement piece 44 on the wiring cover 4 side and each engagement piece 54 on the partition wall 50 side will be described. Each engagement piece 44 includes a groove portion 441, a shield portion 442 having a predetermined size, and the like. The groove gap K2 of the groove portion 441 (see FIG. 6) is set so as to correspond to the plate thickness of the engaging piece 54 of the rising wall 52, while the groove gap M of the engaging piece 54 of the rising wall 52 is set. (See FIG. 5) is set so as to correspond to the plate thickness of the engaging piece 44 on the wiring cover 4 side. The size of the shielding part 442 is set as follows. That is, the size of the shielding portion 442 is engaged by entering and engaging in the groove portion 441 of the engagement piece 44 on the wiring cover 4 side in a state where the groove portions of the engagement piece 54 on the rising wall 52 side cross each other, The wiring cover 4 is set to be in a mounted state in which movement in the vertical and horizontal directions is prevented, and at the same time, the shielding portion 442 is set to cover and close the processing hole 521.

  Next, the procedure at the time of installing the power conditioner will be described. The power conditioner is fixed to the wall hanging state by attaching the back wall 25 of the housing body 2 to the indoor wall surface at a predetermined position to be installed. At the time of this attachment, the rear opening 11 (see FIG. 1B) is aligned so as to face the wiring holes on the indoor wall surface through which various wirings are arranged. A mounting plate (not shown) may be interposed between the indoor wall surface to be installed and the back wall 25. After fixing the inverter to the installation target wall, various wiring connections are performed. For this purpose, first remove the front cover 3 of the inverter (see FIG. 2), then remove the wiring cover 4 (see FIGS. 3 and 4), and then draw various wires into the wiring connection portion 5. Then, the terminal block 81 and the connectors 82 are connected. When the connection work is completed, the installation work is completed by attaching the front cover 3 after the wiring cover 4 is attached. Hereinafter, the procedure for attaching and detaching the wiring cover 4 will be described in detail. The wiring cover 4 can be removed by performing the reverse operation of the mounting procedure.

  First, as shown in FIG. 4 and FIG. 7A, as a first step, the wiring cover 4 is moved to a position below the wiring connecting portion 5 and shifted forward by a predetermined amount, and from that position upward. Push up toward the wiring connection portion 5 (in the direction of arrow U in FIGS. 4 and 7A). The predetermined amount of the shift means that even if the wiring cover 4 is pushed upward (see the one-dot chain line in FIG. 7A or FIG. 8), the engaging pieces 44 and 44 of the wiring cover 4 are engaged pieces 54 and 54, respectively. The dimension H is such that the engagement claw 43 can be inserted into the engagement slit 53 without contacting (see FIG. 7A). Accordingly, when the push-up operation from the predetermined position in the first step is completed, the engagement claw 43 of the wiring cover 4 is inserted into the engagement slit 53, while the engagement piece 44 and the engagement piece 54 are engaged. It is in the previous state. Next, as the second step, the wiring cover 4 in the state where the first step is finished is pushed inward (rearward; direction of arrow S in FIGS. 7A and 8). As a result, the slit edge of the engagement slit 53 enters and engages with the engagement claw 43, and at the same time, the groove portions of the engagement pieces 54 and 54 enter the groove portion 441 of the engagement pieces 44 and 44 and engage with each other. Thus, the wiring cover 4 reaches a mounted state (the state shown in FIG. 7B and FIG. 9) in which movement is prevented both in the vertical direction, in the horizontal direction, and in the rear direction. When in the mounted state, the shielding portions 442 of the engaging pieces 44 and 44 are in a state of covering and closing the processing holes 521 of the rising wall 52, and even if insects enter the wiring connection portion 5, they are processed. It becomes possible to reliably prevent insects from entering the inside of the casing body 2 partitioned by the partition wall 50 from the wiring connection portion 5 side through the hole 521. In addition, when in the mounted state, the side plate portion 41 of the wiring cover 4 is flush with the right side wall 22 of the housing body 2, and the bottom plate portion 42 of the wiring cover 4 is flush with the bottom wall 24 of the housing body 2. The overall shape is rectangular due to the housing body 2 and the wiring cover 4, and the appearance is improved. Then, after the wiring cover 4 is put into the mounted state, the installation work is completed by covering the front cover 3 and screwing it to the screw holes 422 of the wiring cover 4 and the like.

  In the case of the above embodiment, when the wiring cover 4 is detachably attached to the wiring connection portion 5 formed in a part of the housing body 2 using the engaging means, the engagement pieces 53 and 53 are formed. By attaching the wiring cover 4, the processing hole 521 that occurs in the housing body 2 can be covered and closed by the shielding portions 442 and 442 of the engaging pieces 44 and 44 of the wiring cover 4 at the same time as the mounting. . Accordingly, it is possible to reliably prevent insects and the like from entering the inside of the housing body 2 through the processing holes 521.

<Other embodiments>
In addition, this invention is not limited to the said embodiment, Other various embodiment is included. That is, in the said embodiment, the wiring connection part 5 is divided and formed in the shape which recessed the corner | angular part of the housing body 4, and the wiring cover 4 is comprised by the L-shaped thing in connection with this. The overall shape of the casing body 2 and the wiring cover 4 is rectangular. However, the present invention is not limited to this, and the space of the wiring connection portion is the top wall and the right side wall constituting the frame around the casing body. The wiring connection part is formed by dividing the middle part of either the left side wall or the bottom wall so as to be recessed inward, and the wiring cover for covering the wiring connection part is configured with a flat planar shape. You may do it. In this case, the engagement pieces having the same configuration as the engagement pieces 44 of the above-described embodiment may be formed so as to protrude from both end positions of the planar wiring cover.

  Further, in the above-described embodiment, when the wiring cover 4 is mounted, the shielding portion 442 of the engagement piece 44 covers and closes the processing hole 521 on the partition wall 50 side, thereby preventing insects from entering. Since the purpose is to prevent the invasion of insects, the size of the shielding part 442 can prevent the invasion of insects even if the size is the size for preventing the invasion of insects, that is, it does not completely cover the processed hole 521 It is possible to make the size so as to substantially cover the entire processing hole 521. Of course, the shielding part 442 is desirably large enough to completely cover the entire processing hole 521, but if the upper limit (for example, 3 mm) of the size of the hole that opens inward and outward in order to prevent insects from entering is determined by some standard. Further, it can be set to a size that allows a gap or the like smaller than the upper limit to remain.

  Furthermore, although the case where it was the wiring connection part 5 as a recessed part formed in a part of circumference | surroundings of the housing body 2 was demonstrated in the said embodiment, not only this but the recessed part of another use may be sufficient.

DESCRIPTION OF SYMBOLS 1 Case 2 Case main body 4 Wiring cover (cover member)
5 Wiring connection (recess)
41 Side plate part 42 Bottom plate part 44 Engagement piece (engagement piece formed in cover member)
51 Top wall portion 52 Upright wall 54 Engagement piece (engagement piece formed on partition wall)
50 Partition wall 81 Terminal block 442 Shielding part 521 Processing hole

Claims (3)

In a power conditioner with a housing and a wiring terminal block,
The housing includes a housing body in which a concave portion is formed by a partition wall in a part of the periphery, and a cover member that is detachably attached to the partition wall by an engaging means to shield the concave portion,
The engagement means includes an engagement piece formed on the partition wall and an engagement piece formed on the cover member so as to engage with the engagement piece.
The engagement piece of the partition wall is integrally formed in a state of protruding from the partition wall by punching a sheet metal constituting the partition wall,
The engagement piece of the cover member is formed on the partition wall by the punching process in the mounted state of the cover member in which the engagement piece of the cover member and the engagement piece of the partition wall are engaged with each other. It has a shield that is large enough to cover and close the processed hole.
A power conditioner characterized by that. The power conditioner according to claim 1,
The concave portion is defined by a partition wall composed of a rising wall that rises upward at a lower corner portion of the housing body and a top wall portion that extends horizontally from the upper end of the rising wall,
The cover member is formed in an L-shaped cross section with a bottom plate portion and a side plate portion extending upward from an end portion of the bottom plate portion,
The casing is a power conditioner configured such that the entire shape is rectangular when the cover member is mounted on the casing body. A power conditioner according to claim 1 or claim 2,
The concave portion is constituted by a wiring connecting portion in which the terminal block is provided, and a space for performing wiring connecting work is formed by releasing the engaging means and removing the cover member. The inverter is configured.

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