JP5892808B2 - Cover structure of electrical component box for air conditioner - Google Patents

Description

  Embodiments described herein relate generally to a cover structure for an electric component box for an air conditioner.

For example, an electrical component box provided in an outdoor unit of an air conditioner may have a configuration in which an opening for wiring work provided on the bottom surface of the electrical component box can be opened and closed by a wiring cover that is slidably attached. (For example, refer to Patent Document 1).
However, in this configuration, the wiring cover has a large area covering substantially the entire bottom of the electric component box, and the entire wiring cover having such a large area is slid. Therefore, the structure is complicated, and it is expensive to manufacture such a complicated structure.

No. 2009/041424

  Thus, a cover structure for an air conditioner electric component box is provided which can cover an opening provided in an electric component box provided in the air conditioner without causing a complicated structure.

The cover structure of the electrical component box for an air conditioner according to the present embodiment constitutes an outer shell of the electrical component box, covers a casing having a maintenance opening communicated with the interior of the electrical component box, and covers the opening. And a cover member. The cover member has a temporary fixing portion that is inserted into a slit formed in the housing on one end side of the cover surface portion that covers the opening, and is engaged with a locked portion formed on the housing on the other end side of the cover surface portion. It has a locking part to stop. The said latching | locking part has three latching piece parts, The said latching piece part of the center is bent inside.

The perspective view which concerns on one Embodiment and shows the outdoor unit of an air conditioner Perspective view showing the internal configuration of the outdoor unit The perspective view which looked at the electrical component box which attached the cover member from the bottom side The perspective view which looked at the electrical component box which the cover member is a temporarily fixed state from the bottom side (the 1) The perspective view which looked at the electrical component box which the cover member is temporarily fixed from the bottom side (the 2) Bottom view showing the electrical component box in which the cover member is temporarily fixed Perspective view of cover member Side view of cover member The figure which shows an example of the material board for forming an electrical component box

  Hereinafter, a cover structure of an electrical component box for an air conditioner according to an embodiment will be described with reference to the drawings. As shown in FIG. 1, an outdoor unit 10 of an air conditioner has a rectangular box-shaped metal outdoor unit body 11. The front cabinet 12 constituting the front surface of the outdoor unit main body 11 is provided with a fan guard 12a fitted into a blowout port (not shown). A metal packed valve cover (side cover) 14 is detachably attached to the right side cabinet 13 constituting the right side surface of the outdoor unit body 11. Further, the upper surface of the outdoor unit body 11 is configured by a top plate 15, the left side surface of the outdoor unit body 11 is configured by a left side cabinet (not shown), and the back surface of the outdoor unit body 11 is configured by a rear cabinet (not shown). . The left side cabinet has crosspieces at predetermined intervals in the vertical direction, and the crosspieces are open. The rear cabinet has crosspieces with predetermined intervals in the vertical and horizontal directions, and the crosspieces are open.

  Next, the internal configuration of the outdoor unit 10 will be described with reference to FIG. As shown in FIG. 2, the interior of the outdoor unit main body 11 is configured such that the upper space of the bottom plate 16 constituting the bottom surface of the outdoor unit main body 11 is divided into two spaces by a partition plate 21. The partition plate 21 has a front end in contact with the back surface of the side of the outlet of the front cabinet 12 and a rear end in contact with a corner where the rear cabinet and the right side cabinet 13 intersect. The partition plate 21 extends in parallel to the left and right side cabinets from the front cabinet 12 toward the back, and is further bent obliquely from the vicinity of the rear cabinet toward the corner where the right side cabinet 13 and the rear cabinet intersect. It has been.

The space chamber formed on the left side cabinet side of the partition plate 21 is the heat exchange chamber 11A, and the space chamber formed on the right side cabinet 13 side is the machine chamber 11B. From the mounting position and form of the partition plate 21, the heat exchange chamber 11A has a volume of about 3/4 inside the outdoor unit body 11, and the machine room 11B has a remaining volume of about 1/4.
An outdoor heat exchanger 22 is disposed in the heat exchange chamber 11A. The outdoor heat exchanger 22 is placed on the bottom plate 16 of the outdoor unit main body 11, is close to the left side cabinet and the rear cabinet, and is substantially L-shaped in plan view along the left side cabinet and the rear cabinet. It is formed in a shape. One end of the outdoor heat exchanger 22 extends to a corner where the front cabinet 12 and the left side cabinet intersect, and the other end extends to a corner where the right side cabinet 13 and the rear cabinet intersect.

  Further, a fan support member 23 is provided in the heat exchange chamber 11 </ b> A, and an outdoor fan 24 is supported by the fan support member 23. That is, the outdoor fan 24 is located in a space surrounded by the outdoor heat exchanger 22, the partition plate 21, and the front cabinet 12 in the outdoor unit body 11. The outdoor blower 24 is configured by a propeller fan that sucks air from the back side of the outdoor unit body 11 and blows it out to the front side. By the air blowing action of the outdoor blower 24, the left side cabinet side and the rear cabinet side of the opening structure become the outside air suction side, and the front cabinet 12 side having the outlet facing the axial front side of the propeller fan is the air after the heat exchange. It becomes the balloon side. A reinforcing member (not shown) that contacts the front cabinet 12 is attached to the upper end portion of the blower support member 23 via a fixture. This reinforcing member is formed by using a punched piece obtained when the outlet is formed in the front cabinet 12 by punching.

  On the other hand, a compressor 25 and a gas-liquid separator 26 are disposed in the machine room 11B, and piping 27 including a four-way switching valve connected to the compressor 25 and the gas-liquid separator 26 is accommodated. Yes. The piping 27 includes a packed valve (piping connection on-off valve) 27a to which a refrigerant pipe extending from an indoor unit (not shown) is connected. The packed valve 27a is exposed from the lower part of the right side cabinet 13 and is covered by the packed valve cover 14 described above. The compressor 25, the gas-liquid separator 26, the four-way switching valve, and the like are connected to the outdoor heat exchanger 22 in the heat exchange chamber 11A, the indoor heat exchanger accommodated in the indoor unit, and the like through a refrigerant pipe. Thus, a refrigeration cycle is configured.

  The machine room refrigeration cycle component 28 including the compressor 25, the gas-liquid separator 26, the four-way switching valve, the piping 27, and the like disposed in the machine room 11B has an overall height dimension from the bottom plate 16 to the top plate. Therefore, the space in the upper part of the machine room refrigeration cycle component 28 is generated in the outdoor unit main body 11. And the electrical component box 31 is attached to this space part. That is, the upper end of the partition plate 21 is notched, and the electric component box 31 is fitted into the notched portion, and is fixed in a state of being interposed between the partition plate 21 and the top plate 15. At this time, the electrical component box 31 is arranged in the outdoor unit main body 11 above the machine room refrigeration cycle part 28 including the compressor 25 with a space from the machine room refrigeration cycle part 28. The electrical component box 31 has a thin box shape as a whole, and approximately 3/4 of the electrical component box 31 is located in the machine room 11B, and the remaining approximately 1/4 projects into the heat exchange chamber 11A.

  Next, the configuration of the electrical component box 31 will be described in detail with reference to FIGS. As shown in FIGS. 3 to 6, the housing 32 that forms the outline of the electrical component box 31 includes a base portion 33 and a lid portion 34. The base portion 33 is made of metal and has a rectangular box shape with an upper surface opened. The upper surface opening portion of the base portion 33 is closed by a metal rectangular plate-like lid portion 34, whereby a rectangular box-shaped housing 32 is formed. A resin control board base (not shown) is disposed between the base part 33 and the lid part 34, and a control board 35 shown in FIG. 6 is attached to the control board base. The lid portion 34 has a bent portion bent downward so as to cover the outer peripheral surface of the control board base at the peripheral edge portion thereof in order to prevent water and the like from entering the inside of the base portion 33 from the upper surface side. ing.

  Further, on the bottom surface of the base portion 33, that is, the portion constituting the bottom surface of the electrical component box 31, as shown in FIGS. Is provided. The opening 36 has a substantially rectangular shape with four corners formed in an arc shape. The size of the opening 36 is such that a human hand can be inserted. At the time of the process and the maintenance work, the operator can insert a finger from the outside into the electric component box 31 to perform wiring connection with the control board 35 and wiring removal work.

  In addition, a wiring lead-out hole 36a is integrally formed in the opening 36 by extending a part of the opening edge to the outside. The wiring lead-out hole portion 36a is an opening hole for leading a compressor wiring (not shown) that extends from the control board 35 in the housing 32 of the electrical component box 31 and is connected to the compressor 25 from the housing 32 into the machine room 11B. It is. The opening 36 is covered by the detachable cover member 51, which will be described later in detail, so that substantially the entire portion except the wiring lead-out hole 36a is covered. The wiring lead-out hole 36a is preferably formed as small as possible, not as large as necessary. Thereby, in the state where the opening part 36 is covered with the cover member 51, the blockage degree of the electrical component box 31, that is, the degree of the interior of the electrical component box 31 being blocked from the outside can be increased. Further, the wiring lead-out hole 36 a may be provided separately from the opening 36.

  The control board 35 is a printed circuit board, and a CPU for controlling the overall operation of the outdoor unit 10 and a memory for storing a control program, an operation history, and the like are mounted on the upper surface side or the lower surface side of the control board 35 to constitute a control circuit. ing. Further, a plurality of connectors to which an electrolytic capacitor, a power transistor, a thermistor, and the like are connected are mounted on the lower surface side of the control board 35, and wire harnesses for an electric valve and a four-way switching valve are connected. More specifically, on the lower surface of the control board 35, electrical components for controlling electric components such as the compressor 25 in the machine room 11B, the four-way switching valve constituting the piping 27, and the outdoor fan 24 in the heat exchange chamber 11A. Is mounted, and at least an electric component having a large vertical dimension is attached to the lower surface of the control board 35 in a suspended state. In addition, on the side of the electrical component box 31 on the side of the heat exchange chamber 11 </ b> A, heat radiating fins 38 for cooling heat-generating components such as power transistors are provided. The radiating fins 38 are exposed in the heat exchange chamber 11 </ b> A in a state where the electric component box 31 is attached in the outdoor unit body 11.

  Further, as shown in FIG. 6, a service terminal 35 a is provided on the lower surface of the control board 35. The service terminal 35a is a terminal for connecting an external information processing terminal and the control board 35 with a communication cable (not shown) at the time of various maintenance operations such as version upgrade of a control program and analysis of operation history. The opening 36 described above is provided on the bottom surface of the electrical component box 31 at a position facing the service terminal 35a.

  A slit 39 is formed on the bottom surface of the electrical component box 31, in other words, on the bottom surface of the base portion 33 of the housing 32, located slightly inside the opening portion 36. The slit 39 opens linearly along the inner side of the opening 36. Further, a locked portion 40 is provided on the side surface of the electrical component box 31 on the opening portion 36 side, in other words, on the side surface on the opening portion 36 side of the base portion 33 of the housing 32. The locked portion 40 includes a bag portion 41 and a protruding portion 42. The bag portion 41 is opened downward in a bag shape, and has a folded portion 41a that is folded upward and rounded at the inlet portion. Moreover, the protrusion part 42 is located in the both sides of the bag part 41, has the roundness at the front-end | tip part, and protrudes outward.

  Next, the cover member 51 will be described in detail with reference to FIGS. As shown in FIGS. 7 and 8, the cover member 51 includes a cover surface portion 52, a temporary fixing portion 53, and a locking portion 54. The cover surface portion 52 is a plate-shaped portion that is formed to be slightly larger than the above-described opening portion 36 and has a substantially rectangular shape with four corners formed in an arc shape like the opening portion 36. Therefore, the cover member 51 is configured to cover substantially the entire opening 36 except for the wiring lead-out hole 36a by the cover surface portion 52. The temporary fixing portion 53 is formed at one end side of the cover surface portion 52, in this case, a portion attached to a portion inside the opening portion 36 on the bottom surface of the electrical component box 31. The temporary fixing portion 53 is formed in a step shape from one end portion of the cover surface portion 52, and has a claw shape extending in parallel to the cover surface portion 52 from one end portion of the cover surface portion 52. The locking part 54 is the other end side of the cover surface part 52, that is, the side opposite to the side on which the temporary fixing part 53 is formed. In this case, the part attached to the side surface of the electrical component box 31 on the opening 36 side. Is formed.

  The cover member 51 has a configuration in which the other end is bent, and the bent portion is configured as a locking portion 54. Therefore, the locking portion 54 is formed so as to extend perpendicularly to the cover surface portion 52 from the other end side of the cover surface portion 52. That is, the locking portion 54 extends in a direction orthogonal to the direction in which the temporary fixing portion 53 extends in the cover member 51, whereby the cover member 51 is locked to the temporary fixing portion 53 as shown in FIG. 8. The cross section connecting the portion 54 is substantially L-shaped.

  The locking portion 54 of the cover member 51 will be described in more detail. The locking portion 54 has three locking piece portions 54a, 54b, and 54c. Of the three locking pieces 54a, 54b and 54c, the upper locking portion 54a of the central locking piece 54a is gently bent inward, as indicated by an arrow A in FIG. In addition, it is configured to be elastically deformable further inward. This locking piece portion 54a is for locking the locking portion 54 to the locked portion 40 by being inserted into the above-described bag portion 41, but when inserted into the bag portion 41, Guided by the folded portion 41a of the entrance portion, it is inserted smoothly while being elastically deformed. On the other hand, the upper end portions of the locking piece portions 54b and 54c on both sides are gently bent outward and have a hole portion 55 at a substantially central portion in the vertical direction. These locking piece portions 54b and 54c are for locking the locking portion 54 to the locked portion 40 when the above-described protruding portion 42 is fitted into the hole 55.

  As shown in FIG. 9, the cover member 51 is formed from an end material 61 a generated when the housing 32 of the electrical component box 31 is formed from a metal material plate 61. In this case, as the end material 61a, a portion other than the base portion forming material 61b that forms the base portion 33 of the housing 32 is used.

Next, when the cover member 51 configured as described above is attached to the electrical component box 31, that is, when the open opening 36 is covered, and when the cover member 51 is removed from the electrical component box 31, that is, A case where the opening 36 in the closed state is opened will be described.
When attaching the cover member 51, first, the temporary fixing portion 53 of the cover member 51 is inserted into the slit 39 of the electrical component box 31. As a result, as shown in FIGS. 4 to 6, the cover member 51 is in a temporarily fixed state in which the cover member 51 is separated from the opening 36 and is opposed to the opening 36 in an inclined state. Next, the entire cover member 51 in the temporarily fixed state is rotated toward the opening 36 with the base portion of the temporary fixing portion 53, that is, the boundary portion between the cover surface portion 52 and the temporary fixing portion 53 as a fulcrum. The part 54 is brought close to the locked part 40 side. Then, the cover member 51 is further rotated so that the locking piece portion 54a of the locking portion 54 is inserted into the bag portion 41 of the locked portion 40 while the locking piece portions 54b and 54c of the locking portion 54 are inserted. The protruding portion 42 of the locked portion 40 is fitted into the hole portion 55.

  As described above, when the locking piece portion 54a is inserted into the bag portion 41 and the protrusion 42 is fitted in the hole 55 of the locking piece portions 54b and 54c, Due to the elastic force of the locking piece portion 54a slightly elastically deformed, the locked portion 40 is sandwiched between the locking piece portion 54a and the locking piece portions 54b and 54c with the bag portion 41 as the center. Become. Thereby, the locking portion 54 is firmly locked to the locked portion 40. In the cover member 51, the temporarily fixed portion 53 is inserted into the slit 39, and the locking portion 54 is firmly locked to the locked portion 40 so that the opening portion 36 is covered, that is, in the closed state. It is firmly attached to the electrical component box 31.

  In this way, the cover member 51 is firmly attached to the electrical component box 31 without requiring fixing with screws or the like. In particular, in this case, the cover member 51 is attached to the bottom surface of the electrical component box 31. However, since the cover member 51 is firmly attached to the electrical component box 31, it is prevented from dropping due to its own weight. When attaching the cover member 51 to the electrical component box 31, the compressor wiring extending from the electrical component box 31 may be stored in advance in the wiring lead-out hole 36a, or while the cover member 51 is attached. The compressor wiring may be accommodated in the wiring outlet hole 36a.

  On the other hand, when removing the cover member 51, the hole 55 and the protrusion 42 are pulled by pulling the upper ends of the locking pieces 54 b and 54 c of the locking portion 54 that are gently bent outward. Release the mating state. Then, the entire cover member 51 is rotated with the base portion of the temporary fixing portion 53 as a fulcrum, on the side opposite to that at the time of attachment, that is, in the direction away from the opening 36, and the locking portion 54 is moved away from the locked portion 40. . At this time, with the rotation of the cover member 51, the locking piece portion 54 a of the locking portion 54 is pulled out from the bag portion 41 of the locked portion 40, whereby the locking portion 54 and the locked portion 40 are Is completely released, and the cover member 51 is temporarily fixed. And the temporary fixing part 53 of the cover member 51 is pulled out from the slit 39 of the electrical component box 31, and thereby, the cover member 51 is removed from the electrical component box 31, and the opening 36 is opened to the outside.

The cover structure of the electrical component box for an air conditioner according to one embodiment described above constitutes an outer shell of the electrical component box, and has a casing having a maintenance opening communicated with the interior of the electrical component box. A cover member for covering the opening. The cover member has a temporary fixing portion that is inserted into a slit formed in the housing on one end side of the cover surface portion that covers the opening, and is engaged with a locked portion formed on the housing on the other end side of the cover surface portion. It has a locking part to stop. According to this structure, the opening part provided in the electrical component box with which an air conditioner is equipped can be covered, without causing complication of a structure.
In the present embodiment, “covering” the opening includes not only the concept of covering the entire opening but also the concept of covering a part of the opening.

  The above-described embodiment has been presented as an example, and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 10 is an outdoor unit, 25 is a compressor, 31 is an electrical component box, 32 is a housing, 36 is an opening, 36a is a wiring outlet hole, 39 is a slit, 40 is a locked portion, 42 is a protrusion, Reference numeral 51 denotes a cover member, 52 denotes a cover surface portion, 53 denotes a temporary fixing portion, 54 denotes a locking portion, 54a, 54b and 54c denote locking pieces, 55 denotes a hole, and 61a denotes an end material.

Claims (5)

A cover structure for an electrical component box provided in an air conditioner,
The outer casing of the electrical component box is configured, and a housing having a maintenance opening communicated with the interior of the electrical component box,
A cover member for covering the opening,
The cover member has a temporary fixing portion to be inserted into a slit formed in the housing on one end side of the cover surface portion covering the opening, and a cover formed on the housing on the other end side of the cover surface portion. have a locking portion for engaging the locking portion,
The said latching | locking part has three latching piece parts, The cover structure of the electrical component box for air conditioners by which the said latching piece part of the center is bent inside .   The cover structure of the electric component box for an air conditioner according to claim 1, wherein the cover member is bent at the other end, and the bent portion is configured as the locking portion. The locked portion has a protrusion protruding outward,
The cover structure of the electrical component box for an air conditioner according to claim 1 or 2 , wherein the engaging piece portions on both sides have holes into which the protrusions are fitted. The electrical component box is disposed above the compressor in the outdoor unit of the air conditioner,
The air according to any one of claims 1 to 3 , wherein the opening integrally has a wiring outlet hole portion for extending a compressor wiring connected to the compressor and extending from the inside of the housing. Cover structure of the electrical component box for the harmonic machine. The said cover member is the cover structure of the electrical component box for air conditioners of any one of Claim 1 to 4 currently formed from the end material produced when forming the said housing.

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