JP2008089191A - Outdoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shared electric component box capable of loading base boards of various sizes. <P>SOLUTION: A base board holding frame 3 and a cover 4 are formed corresponding to a maximum base board size, locking claws 3g, 3h for fixing the board are disposed on an inner wall of the base holding frame 3, a horizontal bar 3r is projected from the inner wall of the base board holding frame 3 to a side opposite to a mounting face at a position corresponding to a short side 6b of a S base board 6 having a short long side with reference to one of short sizes of the base board holding frame 3, a lower face of the cross piece 3r is kept into contact with the S base board, and an L base board 5 and the S board 6 are provided with board elements in a state that legs of the board elements and the like are not projected to parts kept into contact with the cross piece 3r. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to an electrical component box of the outdoor unit.

  A conventional outdoor unit of an air conditioner is equipped with an electrical component box that houses electrical control components for controlling a compressor, a blower, and the like. The electrical component box attaches and supports a control board on which the electrical control components are mounted. In addition, the control board is located in the upper part and has a board holding frame that accommodates all the electric control parts facing downward, and the electric parts box can hold only one size, and the board holding A frame and a peripheral component group are a pair (for example, refer patent document 1).

Japanese Patent Laid-Open No. 9-60928 (paragraphs 0036 to 0088, FIGS. 1 to 4)

  In the conventional electric component box, the size of the substrate that can be stored is limited to one size, and there is a limit when it is desired to improve the capacity and output as an air conditioner while maintaining the same size. On the other hand, in order to change the board size, the board holding structure and the peripheral component group must be remade according to the board size, and much labor and mold costs must be spent. there were.

  The present invention has been made to solve the problems as described above, and provides an outdoor unit of an air conditioner including an electric component box that can be mounted and shared even with substrates of different sizes.

An outdoor unit of an air conditioner according to the present invention includes an electric component box having a holding frame that supports a mounting surface of a board downward, and a cover that is provided on an upper surface of the holding frame and covers a side opposite to the mounting surface of the board. In the outdoor unit of an air conditioner provided, the substrate is one of a plurality of types of substrates having a constant short side size and a long side size, and the inner wall surface of the substrate holding frame is the plurality of types A substrate is fixed so that a substrate of the largest size among the substrates can be inserted, provided on the inner wall on the long side of the substrate holding frame, and can fix any of the end portions on the long side of the plurality of types of substrates. And
When one short side portion of a substrate smaller than the maximum size is aligned with the inner wall surface on one short side of the substrate holding frame, the length of the substrate holding frame is at a position corresponding to the other short side portion. And a rail projecting from both inner wall surfaces on the side to the side opposite to the mounting surface of the substrate, and the substrate is disposed so that the side opposite to the mounting surface contacts the lower surface of the rail and contacts the rail The mounting component is arranged so that the feet of the mounting element do not protrude on the side opposite to the mounting surface.

  According to the present invention, the short side size is constant and the long side size is one of a plurality of types of substrates, and the inner wall surface of the substrate holding frame is the largest size of the plurality of types of substrates. Of the substrate holding frame is provided on the inner wall of the long side of the substrate holding frame, and can fix any of the long side end portions of the plurality of types of substrates, and one of the substrate holding frames. When one short side part of the substrate smaller than the maximum size is aligned with the inner wall surface on the short side, the substrate from the inner wall surface on the long side of the substrate holding frame to the position corresponding to the other short side part. The board is arranged so that the anti-mounting surface side is in contact with the lower surface of the counter, and the mounting element legs do not protrude on the anti-mounting side that contacts the counter. Since the mounting parts are arranged on the board, even boards of different sizes can be shared.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing an outdoor unit of an air conditioner equipped with an electric component box according to Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view of an electric component box of the outdoor unit of the air conditioner, and FIG. 2 is an exploded perspective view of the main part of the electric component box. FIGS. 5 and 6 are cross-sectional views of the main part of the outdoor unit and the electric parts box. The BB cross section of is shown.
In FIG. 1, a heat exchanger, a propeller fan, a compressor, a refrigerant pipe (not shown) and the like are accommodated in an outdoor unit main body 1 of an air conditioner, and a machine room 1b in which a compressor is disposed by a separator 1a. And an air passage chamber 1c in which a propeller fan is disposed. In addition, an outdoor unit opening 1d for connecting a power source, taking in outside air, and the like is provided on a side surface of the outdoor unit main body 1, and an electrical component box 9 is provided at the upper end of the separator 1a.

Normally, an outdoor unit having an inverter drive circuit requires a control board cooling structure on which mounting elements such as a board element for controlling a propeller fan, a compressor, etc., a transistor, and a diode are mounted. The heat sink 7 directly attached to the transistors and diodes is exposed to the air passage chamber 1c to dissipate heat.
In order to apply air to the surface of the substrate, a ventilation path is formed by ventilation holes (not shown) drilled in the separator 1 a or the heat sink support 2 and the outdoor unit opening 1 d on the side surface of the outdoor unit body 1. Due to the negative pressure in the air passage chamber 1c, outside air is drawn into the machine chamber 1b from the outdoor unit opening 1d, passes through the surface of the substrate, and flows out to the air passage chamber 1c.

  At this time, since the outside air carries the dust into the machine room 1b, it is necessary to consider that dust does not accumulate on the board. When the element mounting surface of the board is placed downward and horizontally, the dust will intrude and be anti-mounted. Since it may adhere to the surface and cause oxidation, insulation failure, short circuit, etc., it is important not to allow dust to flow into the non-mounting surface of the substrate element on the upper surface side.

In FIG. 2, the electrical component box 9 includes an L substrate 5 (shown by a dotted line) of the maximum size or an S substrate 6 (shown by a solid line) smaller than the maximum size with the element mounting surface facing downward and horizontally. The heat sink support that supports the heat sink 7 that is fixed to the L substrate 5 and the S substrate 6 with screws (not shown) so as to abut on the substrate holding frame 3 having a structure attached from below and the transistors and diodes. 2 and a cover 4 that covers the upper surface of the substrate holding frame 3.
The board attached to the board holding frame 3 of the electrical component box 9 varies in size depending on the model, but the board mounted on each model is one, and the length of the long side is changed by keeping the short side the same. The large L substrate 5 and the small S substrate 6 are selectively used.

  The heat sink support 2 has a square hole 2a with a dimension that only the heat sink fins 7a can be exposed, and small side holes 2b and 2c for fixing to the substrate holding frame 3 are provided on the side surface. At this time, the heat sink fin attachment root surface 7 b is in contact with the heat sink support 2.

2 to 4, the substrate holding frame 3 is a resin frame formed of an inner wall and an outer wall that surround the outer periphery of the L substrate 5 with the size of the L substrate 5, and the cover 4 is disposed above the outer wall from above. Locking claws 3a, 3b, 3c, and 3d for closing and fixing are formed, and locking claws 3e and 3f for fixing the heat sink support 2 are formed below the outer wall.
Further, locking claws 3g, 3h and guides 3j, 3k, 3m for fixing the L substrate 5 or the S substrate 6 horizontally are provided on the inner wall so that the L substrate 5 and the S substrate 6 can be fixed together. Yes. Further, vertical bars 3n and horizontal bars 3p, 3q, 3r for reinforcement are projected from the inner wall.

  5 and 6, FIG. 5 shows a case where the L substrate 5 is attached to the substrate holding frame 3, and FIG. 6 shows a case where the S substrate 6 is attached to the substrate holding frame 3. Of the above-described vertical beam 3n and horizontal beam 3p, 3q, 3r, as shown in FIG. 6, the horizontal beam 3r has a short side 6a with reference to the short side 6a (FIG. 2) of the S substrate 6 on the heat sink 7 mounting side. It is provided at a position corresponding to the opposite short side 6b, and the bottom surface has a height that makes contact with the counter-mounting surface 5c of the substrate element of the L substrate 5 or the counter-mounting surface 6c of the S substrate 6. At this time, the positions of the short side 5a of the L substrate 5 on the heat sink 7 attachment side and the short side 6a of the S substrate 6 coincide. Further, the vertical bars 3n and the horizontal bars 3p and 3q have low dimensions so as not to touch the feet of the elements protruding from the anti-mounting surface 5c or 6c.

Next, a procedure for incorporating a substrate into the electrical component box 9 configured as described above will be described with reference to FIGS.
In the case of the L substrate 5, the heat sink 7 is attached to the short side 5 a side of the substrate, the L substrate 5 is inserted from below into the substrate holding frame 3 with the element mounting surface facing downward, and the end of one long side of the substrate Is inserted into the guides 3k and 3m of the substrate holding frame 3 and the end of the other long side of the substrate is pushed up to the guide 3j so as to spread out the locking claws 3g and 3h. When the parts come into contact with each other, the locking claws 3g and 3h return to their original positions, and the end portions of the substrate are locked by the guide 3j and the locking claws 3g and 3h. At this time, the outer periphery of the L substrate 5 is surrounded by the inner wall of the substrate holding frame 3, and the lower surface of the horizontal rail 3 r abuts against the non-mounting surface 5 c of the L substrate 5.

  Next, the small square holes 2 b and 2 c of the heat sink support 2 are fitted into the locking claws 3 e and 3 f of the substrate holding frame 3 while the heat sink fins 7 a are aligned with the square holes 2 a of the heat sink support 2. Then, the cover 4 is covered from above and fixed to the locking claws 3a, 3b, 3c, and 3d to complete the assembly.

  The S substrate 6 is assembled in the same manner, but in the case of the S substrate 6, the anti-mounting surface 6c of the short side 6b opposite to the short side 6a of the substrate to which the heat sink 7 is attached contacts the lower surface of the horizontal rail 3r. Touch.

Next, the storage state of the L substrate 5 and the S substrate 6 will be described with reference to FIGS. In the figure, the outdoor unit opening 1d is located on the right side, and the flow of outside air for cooling entering from the outdoor unit opening 1d is indicated by an arrow. The upper side is covered with the cover 4 on the opposite mounting surfaces 5c and 6c of the L substrate 5 and the S substrate 6, respectively.
FIG. 5 shows a case where the L substrate 5 is accommodated. Since the L substrate 5 has the same inner dimension of the substrate holding frame 3 and the outer peripheral dimension of the L substrate 5, the outside air cannot enter the anti-mounting surface 5c.
Since the horizontal rail 3r abuts against the anti-mounting surface 5c, the elements are arranged on the substrate so that the legs of the substrate elements do not protrude from the substrate surface at the abutting portions.
FIG. 6 shows a case where the S substrate 6 is accommodated. Since the S substrate 6 is provided with the horizontal rail 3r on the short side 6b, the outside air cannot enter the anti-mounting surface 6c. At this time, like the L substrate 5, the elements are arranged on the substrate so that the legs of the substrate elements do not protrude from the substrate surface at the place where the horizontal rail 3 r abuts.

  Further, the mounting reference and mounting dimensions on the heat sink 7 side of the L substrate 5 and the S substrate 6 are the same, and the heat sink fin base surface 7b contacts the outer periphery of the square hole 2a of the heat sink support 2, so that dust from the square hole 2a can be removed. There is no intrusion. Further, since the inner walls exist inside the locking claws 3e and 3f of the substrate holding frame 3, the intrusion of dust is also prevented from the small-angle holes 2b and 2c of the heat sink support 2.

  As described above, the air conditioner includes the holding frame 3 that supports the mounting surface of the substrate downward and the electrical component box 9 that is provided on the upper surface of the holding frame 3 and has the cover 4 that covers the side opposite to the mounting surface of the substrate. In the outdoor unit of the machine, the substrate has a constant short side size and a long side size that is one of a plurality of types of substrates, and the inner wall surface of the substrate holding frame 3 is the largest of the plurality of types of substrates. A substrate fixing portion that is formed so that an L substrate 5 of a size can be inserted, is provided on the inner wall on the long side of the substrate holding frame 3, and can fix any of the end portions on the long side of a plurality of types of substrates, and a substrate holding When one short side 6a of the S substrate 6 smaller than the maximum size is aligned with the inner wall surface on one short side of the frame 3, the long side of the substrate holding frame 3 is positioned at a position corresponding to the other short side 6b. Side rails 3r projecting from both inner wall surfaces on the side to the side opposite to the mounting surface of the board, Since the mounting part is arranged so that the lead wire of the mounting product does not protrude on the side opposite to the mounting surface that is in contact with the horizontal rail 3r. It is possible to obtain a common electric component box 9 that can be mounted on both L and S substrates having different sizes.

In addition, since there is no need for a component die dedicated to the substrate size, the die cost can be reduced.
Furthermore, it is possible to develop variations of models with different capabilities as an air conditioner while keeping the outdoor unit the same size.
Further, when the L substrate 5 is used, since the inner dimension of the substrate holding frame 3 and the outer peripheral dimension of the L substrate 5 are the same, the outside air cannot enter the anti-mounting surface 5c, and when the S substrate 6 is used, Since the horizontal rail 3r is provided at the portion where the short side 6b of the S substrate 6 is located, the outside air cannot enter the anti-mounting surface 6c, and dust can be prevented from entering.

In the present embodiment, the case of using two types of substrates, the L substrate 5 and the S substrate 6, has been described. It can be mounted, and parts management can be simplified and costs can be reduced.
Further, in this embodiment, the horizontal beam 3r of the substrate holding frame 3 is fixed in accordance with the size of the substrate. However, as shown in FIG. 10 may be fixed. In this case, if a hole for the screw 10 is provided in the substrate holding frame 3 in accordance with the size of the substrate smaller than the maximum size substrate, it is easy to cope with different types of substrates, and when a large substrate is used. If the horizontal beam 3w is removed, the case where the foot of the substrate element protrudes from the substrate surface at the position of the horizontal beam 3w can be dealt with.

Embodiment 2. FIG.
In the first embodiment, the horizontal rail 3r is brought into contact with the substrate. However, when the width of the contact portion of the cross cannot be increased due to the arrangement of the substrate elements in the contact portion, the S substrate is used. When 6 is mounted, a horizontal shift may occur and a gap may occur. In the present embodiment, this gap is not generated.
FIG. 8 is an exploded perspective view of an essential part of an electric component box of an outdoor unit of an air conditioner showing Embodiment 2 of the present invention. The same parts as those in FIG. 2 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the figure, a boss 3s formed with a convex portion 3t is provided at an arbitrary position on the horizontal rail 3r, and holes 5d and 6d are formed in the L substrate 5 and the S substrate 6 at positions corresponding to the convex portion 3t.

  As described above, since the boss formed with the convex portion is provided at an arbitrary position of the crosspiece protruding from the substrate holding frame, and the substrate is provided with the hole at the position corresponding to the boss convex portion, the S substrate 6 is accommodated. In this case, since the convex portion 3t is aligned with the substrate hole 6d and restricts the horizontal movement, it is possible to suppress assembly variation, prevent a gap due to displacement, and prevent dust from entering. .

Embodiment 3 FIG.
In the first and second embodiments, the horizontal rail 3r is brought into contact with the substrate and the movement in the horizontal direction is restricted, but in the present embodiment, in consideration of vibration during transportation or operation, This further restricts the movement of the substrate.
FIG. 9 is an exploded perspective view of an essential part of an electric component box of an outdoor unit of an air conditioner showing Embodiment 3 of the present invention. The same parts as those in FIG. 2 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, a 3u screw fixing pilot hole 3u is provided inside a boss 3s formed at an arbitrary position of the horizontal rail 3r, and the L substrate 5 and the S substrate 6 coincide with the 3u 3u screw fixing pilot hole 3u. Holes 5d and 6d are formed at the locations. When the L substrate 5 and the S substrate 6 are housed, they are fixed to the boss 3s with the fixing screws 8 from the mounting surface side through the holes 5d or 6d.

  Thus, the boss 3s formed with the 3u screw fixing pilot hole 3u is provided at an arbitrary position of the horizontal rail 3r protruding from the substrate holding frame 3, and the S board L is provided with the 3u screw fixing pilot hole of the boss 3s. Since the hole 6d is drilled at a position corresponding to 3u, the S substrate 6 can be firmly fixed, and the assembling variation when the S substrate 6 is stored is further suppressed, and a gap due to misalignment is prevented. It is possible to prevent dust from entering well.

  As shown in FIGS. 10 and 11, a boss 3y having a groove 3y1 is formed on the inner surface of the substrate holding frame 3, and the horizontal beam 3z having a step portion 3z1 fitted into the groove 3y1 is used instead of the horizontal beam 3r. You may use for. And the convex part 3t is provided in the lower part of this boss | hub 3y, and it can insert in the board | substrate hole 6d provided in the S board | substrate 6, and can prevent the shift | offset | difference of the S board | substrate 6. FIG. Further, a screw hole may be provided at the lower portion of the boss 3y and screwed.

It is a perspective view which shows the outdoor unit of the air conditioner which has an electrical component box in Embodiment 1, 2, 3 of this invention. It is a disassembled perspective view of the electrical component box of the outdoor unit of the air conditioner in Embodiment 1, 2, and 3 of this invention. It is principal part sectional drawing of the electrical component box of the outdoor unit of the air conditioner in Embodiment 1 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 1 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 1 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 1 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 1 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 2 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 3 of this invention. It is a disassembled perspective view of the principal part of the electrical component box of the outdoor unit of the air conditioner in Embodiment 3 of this invention. It is a disassembled perspective view of the principal part of FIG.

Explanation of symbols

  3 Substrate holding frame, 3a locking claw, 3e locking claw, 3g locking claw, 3j guide, 3k guide, 3r side rail, 3s boss, 3t convex part, 3u screw fixing pilot hole, 4 cover, 5 L board 5a short side, 5c anti-mounting surface, 5d hole, 6S substrate, 6a short side, 6b short side, 6c anti-mounting surface, 6d substrate hole, 7 heat sink, 8 fixing screw, 9 electrical component box.

Claims (3)

In an outdoor unit of an air conditioner provided with an electric component box having a holding frame that supports a mounting surface of a board downward and a cover that is provided on an upper surface of the holding frame and covers a side opposite to the mounting surface of the board,
The substrate is one of a plurality of types of substrates having a constant short side size and a long side size,
The inner wall surface of the substrate holding frame is formed so that a substrate of the maximum size among the plurality of types of substrates can be inserted,
A substrate fixing portion provided on the inner wall on the long side of the substrate holding frame, and capable of fixing any of the end portions on the long side of the plurality of types of substrates;
When one short side portion of a substrate smaller than the maximum size is aligned with the inner wall surface on one short side of the substrate holding frame, the length of the substrate holding frame is at a position corresponding to the other short side portion. A bar projecting from both inner wall surfaces on the side to the side opposite to the mounting surface of the substrate;
With
The substrate is arranged so that the side opposite to the mounting surface is in contact with the lower surface of the crosspiece, and the mounting component is arranged so that the legs of the mounting element do not protrude on the side opposite to the mounting surface that contacts the crosspiece. An outdoor unit of an air conditioner characterized by that.   2. The boss formed with a convex portion is provided at an arbitrary position of the crosspiece protruding from the substrate holding frame, and a hole is formed in the substrate at a position corresponding to the boss convex portion. The outdoor unit of the described air conditioner.   A boss formed with a screw fixing hole is provided at an arbitrary position of a bar projecting from the substrate holding frame, and a hole is formed in the substrate at a position corresponding to the screw fixing hole of the boss. 2. The outdoor unit of an air conditioner according to claim 1.

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