Abstract:
An outdoor unit for an air conditioner, comprising: a cabinet which forms an exterior cover; a terminal disposed within the cabinet and to which the wiring for electric power supply is connected; a metallic rising section which rises to form the peripheral surface of the cabinet and having a window opened to face the terminal; and a lid which is a resin molding and opens and closes the window. The lid is provided with: an outer peripheral rib which protrudes from the periphery of the rear surface of the lid and makes contact with the rising section; and a ridge section which extends along the inner periphery of the outer peripheral rib and protrudes from the rear surface of the lid to form a groove between the ridge section and the outer peripheral rib and which makes contact with the rising section.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to an outdoor unit for an air conditioner and particularly relates to an outdoor unit for an air conditioner, which has a lid for covering a terminal portion to which power supply wiring is connected. 
       BACKGROUND ART 
       [0002]    Patent Document 1 discloses a conventional outdoor unit for an air conditioner. 
         [0003]    This outdoor unit for an air conditioner is disposed outside a room, and electrical components such as a compressor, a fan, and so on are covered with a metallic cabinet constituting an outer casing of the outdoor unit. The cabinet has a bottom plate on which a side plate, a front plate, and a back plate that constitute vertical surfaces are provided in a standing manner and a top plate that is fitted over an upper surface of the cabinet. 
         [0004]    At the side plate, a window portion is provided that is opened/closed with a removable lid, and a terminal portion to which power supply wiring is connected is disposed so as to face the window portion. An operation of establishing connection to the terminal portion is performed via the window portion. On an outer surface of the side plate, a groove constituted by a bead in a semicircular shape in cross section is provided in a recessed manner so as to extend in an L-shape continuously above and on one lateral side of the window portion. 
         [0005]    Since the outdoor unit is disposed outside a room, water that has flowed from the top plate down onto the side plate in the event of rain or the like enters a gap between the side plate and the lid. At this time, the water passes within the groove around the window portion, thus being led downward, so as to be discharged. This can prevent water entry into the terminal portion. 
       LIST OF CITATIONS 
     Patent Literature 
       [0006]    Patent Document 1: JP-A-2002-61885 (Pages 2 to 4,  FIG. 1 ) 
       SUMMARY OF THE INVENTION 
     Technical Problem 
       [0007]    According to the above-described conventional outdoor unit for an air conditioner, however, since the groove constituted by a bead is formed on the metallic side plate, the strength of the side plate is locally increased, so that the side plate becomes likely to be deformed. This has led to a problem that such deformation of the side plate needs to be corrected at the time of assembling the cabinet, resulting in an increase in man-hours required to manufacture the outdoor unit. 
         [0008]    It is an object of the present invention to provide an outdoor unit for an air conditioner that can reduce man-hours required for manufacturing. 
       Solution to the Problem 
       [0009]    In order to achieve the above-described object, the present invention provides an outdoor unit for an air conditioner including: a cabinet that constitutes an outer casing; a terminal portion that is disposed in the cabinet and to which power supply wiring is connected; a metallic standing portion that is provided in a standing manner so as to constitute a peripheral surface of the cabinet and at which a window portion is open so as to face the terminal portion; and a lid that is a resin molded article and with which the window portion is opened/closed. In the outdoor unit for an air conditioner, an outer peripheral rib is provided that protrudes on the periphery of a back surface of the lid and comes in contact with the standing portion, and a protruding portion is provided that protrudes from the back surface of the lid along an inner peripheral side with respect to the outer peripheral rib so that a groove is formed between the protruding portion and the outer peripheral rib and comes in contact with the standing portion. 
         [0010]    According to this configuration, the outdoor unit for an air conditioner is covered with the cabinet including the metallic standing portion. The wiring for supplying power to electrical components in the cabinet is connected to the terminal portion, and an operation of establishing connection is performed via the window portion that is open at the standing portion. In the lid that covers the window portion, the outer peripheral rib and the protruding portion that protrude from the back surface of the lid come in contact with the standing portion. The groove is formed between the outer peripheral rib provided on the periphery of the lid and the protruding portion disposed on the inner peripheral side with respect to the outer peripheral rib. Water droplets entering a gap between the standing portion and the outer peripheral rib under wind pressure in the event of rain or the like are released from the pressure in the groove and thus flow down within the groove on an outer side with respect to the protruding portion, being led to below the terminal portion. 
         [0011]    Furthermore, in the present invention, preferably, in the outer unit for an air conditioner configured as above, the outer peripheral-rib and the protruding portion are each formed on both side portions of the lid. Further, a concave portion is provided that is formed in a U-shape in cross section by being recessed from a front surface of the lid while protruding into the window portion and has an upper wall that extends horizontally along an upper end of the window portion and is inclined downward to the front side, and a blocking rib is provided that protrudes into the window portion so as to be continuous with a side end of the concave portion and extends vertically along a side edge of the window portion. 
         [0012]    According to this configuration, water droplets entering a gap between the standing portion and the outer peripheral rib from a side end portion of the lid flow down within the groove. Water droplets entering the gap between the standing portion and the outer peripheral rib from an upper end portion of the lid flow down on an upper surface of the concave portion protruding into the window portion. Since the upper wall of the concave portion is inclined downward to the front side, the water droplets are partly led to the front side and partly led in a horizontal direction toward both side portions and then flow down on an outer side with respect to the blocking rib. 
         [0013]    Furthermore, in the present invention, preferably, in the outdoor unit for an air conditioner configured as above, the upper wall of the concave portion protrudes to the front side from the front surface of the lid and has a hole. According to this configuration, part of water droplets on the upper surface of the concave portion flows down to the front side so as to be discharged from the hole. 
         [0014]    Furthermore, in the present invention, preferably, in the outdoor unit for an air conditioner configured as above, an engagement portion is provided that is formed so as to protrude on an inner surface of the lid and is engaged with the upper end of the window portion when the lid is lifted with fingers hooked on the concave portion, so that water dropping on the engagement portion is led to both the side portions of the lid by the engagement portion. 
         [0015]    According to this configuration, when lifting is performed with fingers hooked on the concave portion, the engagement portion is engaged with the upper end of the window portion, thus allowing the outdoor unit to be lifted. Water droplets entering a gap between the standing portion and the outer peripheral rib from the upper end portion of the lid flow down the engagement portion, being led in the horizontal direction, and drop on the upper surface of the concave portion or on the outer side with respect to the blocking rib. 
         [0016]    Furthermore, in the present invention, preferably, in the outdoor unit for an air conditioner configured as above, the outer peripheral rib and the protruding portion are each provided to extend continuously in both side portions and an upper portion of the lid, so that the groove is formed in a U-shape in a front view. According to this configuration, water droplets entering a gap between the standing portion and the outer peripheral rib from the side end portion of the lid flow down within the groove. Further, water droplets entering the gap between the standing portion and the outer peripheral rib from the upper end portion of the lid are led to lateral sides by an upper end portion of the protruding portion and then flow down therefrom within regions of the groove lying on both the side portions. 
         [0017]    Furthermore, in the present invention, preferably, in the outdoor unit for an air conditioner configured as above, a through hole is provided through the standing portion at a position lower than the position of the terminal portion so as to face a lower portion of the groove. According to this configuration, water droplets flowing down the groove are led to an inner surface of the standing portion via the through hole and flow down in an inner portion of the outdoor unit so as to be discharged. 
       Advantageous Effects of the Invention 
       [0018]    According to the present invention, since the lid that is a resin molded article and with which the window portion provided at the metallic standing portion of the cabinet is opened/closed has the groove formed by the outer peripheral rib and the protruding portion that come in contact with the standing portion, water droplets entering a gap between the standing portion and the outer peripheral rib are released from pressure by the groove and thus flow down within the groove. This can prevent water entry into the terminal portion. Furthermore, since the lid is a resin molded article, the outer peripheral rib and the protruding portion can be easily formed, and since a groove is not provided on the metallic standing portion, deformation of the standing portion can be suppressed. Thus, man-hours required to manufacture the outdoor unit for an air conditioner can be reduced. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0019]    [ FIG. 1 ] A perspective view showing an outdoor unit for an air conditioner of an embodiment of the present invention. 
           [0020]    [ FIG. 2 ] A side view showing the outdoor unit for an air conditioner of the embodiment of the present invention. 
           [0021]    [ FIG. 3 ] A perspective view showing a lid of the outdoor unit for an air conditioner of the embodiment of the present invention. 
           [0022]    [ FIG. 4 ] A back view showing the lid of the outdoor unit for an air conditioner of the embodiment of the present invention. 
           [0023]    [ FIG. 5 ] A sectional view taken on line A-A of  FIG. 4 . 
           [0024]    [ FIG. 6 ] A sectional view taken on line B-B of  FIG. 4 . 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0025]    The following describes an embodiment of the present invention with reference to the appended drawings.  FIG. 1  is a perspective view showing an outdoor unit for an air conditioner of one embodiment, and  FIG. 2  is a side view thereof. An outdoor unit  1  is disposed outside a room, and electrical components such as a compressor, a fan, and so on are covered with a cabinet  2  constituting an outer casing of the outdoor unit  1 . The cabinet  2  has a bottom plate  3  on which a side plate  5  (standing portion), a front plate  4 , and a back plate (not shown) that constitute peripheral surfaces are provided in a standing manner and a top plate  6  that is fitted over an upper surface of the cabinet  2 . The bottom plate  3 , the side plate  5 , the front plate  4 , the back plate, and the top plate  6  are made of metal in the faun of a steel plate or the like. 
         [0026]    In the cabinet  2 , a terminal portion  8  is provided to which wiring for supplying power to the electrical components is connected. A window portion  5   a  is open at the side plate  5  so as to face the terminal portion  8 . An operation of establishing connection to the terminal portion  8  is performed via the window portion  5   a.  On the side plate  5 , a fitting portion  5   b  is provided in a recessed manner around the window portion  5   a,  and a removable lid  10  that is a resin molded article is fitted to the fitting portion  5   b  so as to close the window portion  5   a.    
         [0027]      FIG. 3  shows a perspective view of the lid  10 , and  FIG. 4  shows a back view thereof. Furthermore,  FIG. 5  shows a sectional view taken on line A-A of  FIG. 4 , and  FIG. 6  shows a sectional view taken on line B-B of  FIG. 4 . At a lower end of the lid  10  on a back surface side thereof, a positioning rib  18  is provided in a protruding manner. In the fitting portion  5   b  (see  FIG. 1 ) of the side plate  5 , an insertion hole  5   d  (see  FIG. 1 ) into which the positioning rib  18  is to be inserted is provided. Positioning of the lid  10  is performed by engaging an upper edge of the window portion  5   a  with an after-mentioned engagement portion  17  and by inserting the positioning rib  18  into the insertion hole  5   d,  and the lid  10  is then fastened with a screw  21  (see  FIG. 1 ). 
         [0028]    On the periphery of a back surface of the lid  10 , an outer peripheral rib  11  is provided in a protruding manner. The outer peripheral rib  11  has an upper portion  11   a  disposed along an upper edge of the lid  10  and a side portion  11   b  disposed along each of both side edges of the lid  10  so as to be continuous with the upper portion  11   a  and thus is formed in a U-shape in a front view. 
         [0029]    On an inner peripheral side of the outer peripheral rib  11 , an inner peripheral rib  12  (protruding portion) is provided at a predetermined distance from the outer peripheral rib  11  so as to protrude from the back surface of the lid  10 . The inner peripheral rib  12  has an upper portion  12   a  and a side portion  12   b  that are opposed to the upper portion  11   a  and the side portion  11   b  of the outer peripheral rib  11 , respectively. A groove  13  is therefore formed between the outer peripheral rib  11  and the inner peripheral rib  12 . The upper portion  12   a  is provided in such a manner as to be divided to the right and left sides of the after-mentioned engagement portion  17 , and resulting partial upper portions  12   a  on the right and left sides are continuous with the side portions  12   b  on the right and left sides, respectively. The inner peripheral rib  12  is therefore formed in an L-shape in a front view. 
         [0030]    In this embodiment, the groove  13  is formed to have a depth of about 1 mm and a width W 3  of about 5 mm that is sufficiently wide with respect to the depth thereof. Furthermore, the outer peripheral rib  11  and the inner peripheral rib  12  are formed to have narrow widths W 1  and W 2  of about 1.5 mm, respectively. 
         [0031]    When the lid  10  is closed, the outer peripheral rib  11  and the inner peripheral rib  12  come in contact with the fitting portion  5   b  (see  FIG. 1 ) of the side plate  5 . Furthermore, the outer peripheral rib  11  and the inner peripheral rib  12  are formed to extend to a lower portion of the lid  10 , and the groove  13  is open at a lower end thereof. In the fitting portion  5   b,  a through hole  5   c  (see  FIG. 1 ) is formed at a position lower than the position of the terminal portion  8  (see  FIG. 1 ) so as to be opposed to a lower portion of the groove  13 . 
         [0032]    A grip portion  14  is provided at an upper portion of the lid  10 . The grip portion  14  has a convex portion  15  in a U-shape in cross section that protrudes on a front surface and a concave portion  16  in a U-shape in cross section that is recessed from the front surface so as to protrude to the back surface side, which are continuous with each other, and thus is formed in an S-shape in cross section. At a location in the convex portion  15  on the back surface side, the engagement portion  17  in an L-shape in cross section that is open on an upper side thereof is provided. When a user lifts the lid  10  with his/her fingers hooked on the grip portion  14 , even in a case where the screw  21  is loose, the engagement portion  17  is engaged with the upper edge of the window portion  5   a  (see  FIG. 1 ). This allows the outdoor unit  1  to be lifted and carried. 
         [0033]    An upper wall  15   a  of the convex portion  15  is inclined downward to the front side. Water derived from rain or the like therefore flows down the convex portion  15 , so that water accumulation at a rear end of the convex portion  15  is prevented, and thus soiling can be reduced. Furthermore, an upper wall  16   a  of the concave portion  16  extends to the front side of the lid  10  while constituting a lower wall of the convex portion  15  and is inclined downward to the front side. The upper wall  16   a  is provided with a hole  16   b  that can prevent slipping of fingers hooked on the grip portion  14  at the time of lifting the outdoor unit  1 . 
         [0034]    The concave portion  16  protrudes into the window portion  5   a  (see  FIG. 1 ), and the upper wall  16   a  thereof is formed to extend in a horizontal direction along the upper edge of the window portion  5   a.  At each of both side ends of the concave portion  16 , a blocking rib  19  is provided to extend vertically so as to be continuous with the concave portion  16 . The blocking rib  19  is disposed on an inner peripheral side with respect to the inner peripheral rib  12  so as to protrude into the window portion  5   a  and extends to below the terminal portion  8  (see  FIG. 1 ) along a side edge of the window portion  5   a.    
         [0035]    In the outdoor unit  1  configured as above, water derived from rain or the like falls on the outdoor unit  1 , and under the pressure of wind and rain, water droplets enter a gap between the fitting portion  5   b  of the side plate  5  and the outer peripheral rib  11 . Since the groove  13  has a large cross-sectional area with respect to the gap between the fitting portion  5   b  and the outer peripheral rib  11 , water droplets entering from the side portion  11   b  of the outer peripheral rib  11  are released from the pressure in the groove  13 . The water droplets thus flow down within the groove  13  on an outer side with respect to the inner peripheral rib  12  without entering the inner peripheral side with respect to the inner peripheral rib  12 . The water droplets flowing down within the groove  13  partly flow down an outer surface of the side plate  5  from a lower end of the lid  10  and partly flow down an inner surface of the side plate  5  via the through hole  5   c.  The water droplets are thus discharged outside the window portion  5   a.    
         [0036]    The outer peripheral rib  11  and the inner peripheral rib  12  may be connected at lower ends thereof so that the lower end of the groove  13  is closed. This causes water droplets flowing down the groove  13  to pass inside the cabinet  2  so as to be discharged and thus can reduce soiling of an outer surface of the cabinet  2 . 
         [0037]    Water droplets entering from the upper portion  11   a  of the outer peripheral rib  11  flow down onto the engagement portion  17  on which they flow in the horizontal direction and drop therefrom onto an upper surface of the concave portion  16 . The water droplets are partly led to the front side since the upper wall  16   a  of the concave portion  16  is inclined and partly flow in the horizontal direction toward both side portions of the concave portion  16 . Water droplets flowing down the upper wall  16   a  to the front side are discharged via the hole  16   b.  Water droplets that have been led to both side ends of the upper wall  16   a  flow down on an outer side with respect to the blocking rib  19 , being led to below the terminal portion  8 , and run on the inner surface of the side plate  5  so as to be discharged. This can prevent water entry into the terminal portion  8 . 
         [0038]    According to this embodiment, since the lid  10  that is a resin molded article and with which the window portion  5   a  provided at the metallic side plate  5  (standing portion) of the cabinet  2  is opened/closed has the groove  13  formed by the outer peripheral rib  11  and the inner peripheral rib  12  (protruding portion) that come in contact with the side plate  5 , water droplets entering a gap between the side plate  5  and the outer peripheral rib  11  are released from pressure by the groove  13  and thus flow down within the groove  13  so as to be discharged. This can prevent water entry into the terminal portion  8 . Furthermore, since the lid  10  is a resin molded article, the outer peripheral rib  11  and the inner peripheral rib  12  can be easily formed, and since a groove is not provided on the metallic side plate  5 , deformation of the side plate  5  can be suppressed. Thus, man-hours required to manufacture the outdoor unit  1  for an air conditioner can be reduced. 
         [0039]    Furthermore, the side portion  11   b  of the outer peripheral rib  11  and the side portion  12   b  of the inner peripheral portion  12  are formed at each of both side portions of the lid  10 , and the concave portion  16  extending horizontally along an upper end of the window portion  5   a  and the blocking rib  19  extending vertically so as to be continuous with the concave portion  16  are provided so as to protrude into the window portion  5   a.  The concave portion  16  is formed in a U-shape in cross section and has the upper wall  16   a  inclined downward to the front side. Thus, water droplets entering from the side portion  11   b  of the outer peripheral rib  11  flow down the groove  13 , and water droplets entering from the upper portion  11   a  drop on the concave portion  16  and, while flowing down the inclined upper wall  16   a  to the front side, flow in the horizontal direction and then flow down on the outer side with respect to the blocking rib  19 . This prevents water droplets from dropping from the concave portion  16  to a terminal portion  8  side and thus can reliably prevent water entry into the terminal portion  8 . 
         [0040]    Furthermore, since the upper wall  16   a  of the concave portion  16  protrudes to the front side from the front surface of the lid  10  and has the hole  16   b , water droplets that have dropped on the concave portion  16  can be discharged from the hole  16   b.    
         [0041]    Furthermore, since water dropping on the engagement portion  17  is led to both the side portions of the lid  10  by the engagement portion  17  that is engaged with the upper end of the window portion  5   a,  water droplets can be easily led to the outer side with respect to the blocking rib  19 . Thus, water droplets can be more reliably prevented from dropping from the concave portion  16  to the terminal portion  8  side. The engagement portion  17  may be formed to extend in the horizontal direction to positions opposed to both the side ends of the concave portion  16 . 
         [0042]    Furthermore, since the through hole  5   c  is provided through the side plate  5  at a position lower than the position of the terminal portion  8  so as to face the lower portion of the groove  13 , water droplets flowing down the groove  13  can be easily made to pass inside the cabinet  2  so as to be discharged. 
         [0043]    Although in this embodiment, the window portion  5   a  is provided at the side plate  5 , the window portion  5   a  may be provided at the front plate  4  or the back plate that constitutes a peripheral surface of the cabinet  2 . Furthermore, although the window portion  5   a  is provided on a vertical surface of the side plate  5 , the window portion  5   a  may be provided on an inclined surface provided on a peripheral surface of the cabinet  2 . Furthermore, the side plate  5  may be formed integrally with one or a plurality among the front plate  4 , the back plate, and the top plate  6 . 
         [0044]    Furthermore, the inner peripheral rib  12  may be formed in the shape of a flat plate that is wide in a width W 2  direction. That is, a protruding portion that protrudes from the back surface of the lid  10  and is disposed on the inner peripheral side with respect to the outer peripheral rib  11  could be used to form the groove  13 . 
         [0045]    Furthermore, the engagement portion  17  may be replaced with another member that can support a load applied thereto when the grip portion  14  is lifted. In this case, the upper portion  12   a  of the inner peripheral rib  12  provided in such a manner as to be divided to both the lateral sides of the engagement portion  17 , i.e. the partial upper portions  12   a  could be formed to extend in the horizontal direction so as to be continuous with each other, so that the groove  13  is formed in a U-shape in a front view. This causes water droplets entering from the upper portion  11   a  of the outer peripheral rib  11  to be led within the groove  13  to the lateral sides along the upper portion  12   a  of the inner peripheral rib  12  and then to flow down therefrom so as to be discharged. 
       INDUSTRIAL APPLICABILITY 
       [0046]    The present invention is applicable to an outdoor unit for an air conditioner, which has a lid for covering a terminal portion to which power supply wiring is connected. 
       LIST OF REFERENCE SYMBOLS 
       [0000]    
       
           1  outdoor unit 
           2  cabinet 
           3  bottom plate 
           4  front plate 
           5  side plate 
           5   a  window portion 
           5   c  through hole 
           6  top plate 
           7  terminal portion 
           10  lid 
           11  outer peripheral rib 
           12  inner peripheral rib 
           13  groove 
           14  grip portion 
           15  convex portion 
           16  concave portion 
           16   a  upper wall 
           16   b  hole 
           17  engagement portion 
           18  positioning rib 
           19  blocking rib 
           21  screw