JP2008106948A - Drip-proof structure in terminal board of outdoor unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate defective operation of a terminal board due to drips without any increase in the number of parts, and further to improve rigidity. <P>SOLUTION: A rib 30 as a drip-proof wall is integrally formed on an upside part of the terminal board 24 and portions of hanging parts 26 positioned on both sides thereof. This rib 30 is shaped substantially like a half-ring, and shaped like a projection projected on the outside surfaces of the hanging parts 26. Thus, the rib 30 projected outward to cover the terminal board 23 is provided on the upside of the terminal board 23, whereby when dew drips of dew condensation caused on the upside of the hanging parts 26 flow down, the drips flow downward along the upside of the ribs 30 so that the drips do not adhere to the terminal board 24. Therefore, the terminal board 24 can eliminate operational failure due to the drips of dew condensation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly to a drip-proof structure in a terminal board of an outdoor unit of an air conditioner.

  An outdoor unit of an air conditioner is generally configured by arranging a heat exchanger, an outdoor fan, a compressor, a reactor, and the like in an outdoor unit casing. In the outdoor unit casing, an electrical component unit containing various electrical components (electronic components) such as a power transistor and a capacitor is disposed. The outdoor fan, the compressor, and the like are driven and controlled by a control circuit in the electrical component unit.

  Electrical wiring between the indoor unit and the outdoor unit of the air conditioner is performed by arranging a terminal board on the outdoor unit and connecting a cable or an electric wire to the terminal board. For example, Patent Documents 1 and 2 shown below are examples of conventional terminals that prevent rainwater that has entered the casing of the outdoor unit from the outside from adhering to the terminal board.

  In Patent Document 1, an opening is provided in the side plate of the outdoor unit casing, and the terminal board is exposed from the inside of the opening. Further, the opening is provided with a wiring cutout formed to the vicinity of the valve base disposed at the lower part of the side plate. The terminal cover covering the opening has a wiring cutout and the cutout. A wiring cover is integrally formed to cover the inter-unit wiring arranged on the unit. Thus, in this patent document 1, since the clearance between the terminal cover and the wiring is closed by the wiring cover, water droplets and the like are prevented from entering the electrical equipment room of the outdoor unit.

  Further, in Patent Document 2, an opening is provided in the upper part of the side surface of the casing of the outdoor unit, and a lid provided with a handle insertion opening is detachably attached to the opening. The handle is inserted and fixed. Then, by providing a rib around the opening on the housing side and attaching the lid, the rib is brought into close contact with the back surface of the lid, so that rainwater stops at the close contact portion between the rib and the lid, and the outdoor unit is opened from the opening. Prevents rainwater from entering inside.

By the way, when a terminal board is attached to the electrical component unit and a reactor is disposed directly or in the vicinity of the electrical component unit, condensation is likely to occur on the inner surface of the casing on the upper side of the electrical component unit due to the high heat of the reactor. When dew condensation occurs, water drops on the upper side of the terminal board and may adhere to the terminal board and cause malfunction. Therefore, in order to prevent such problems, in Patent Document 3, a cover that covers the electrical component unit is employed.
Japanese Patent No. 3043125 (Japanese Patent Laid-Open No. 5-52365) Japanese Patent Laid-Open No. 2003-120961 JP 2004-116975 A

  However, if it is intended to prevent dripping of water droplets onto the terminal board due to the above internal condensation, it is impossible with the idea of Patent Documents 1 and 2, and with Patent Document 3, the cover or lid is not possible. It is necessary to use special members such as the above, and there is a problem that the cost increases.

  The present invention has been made to solve the above-described conventional problems, and its purpose is to prevent malfunction of the terminal board due to water droplets without increasing the number of parts, and to improve rigidity. A drip-proof structure in a terminal board of a possible outdoor unit is provided.

  Therefore, in the drip-proof structure in the terminal board of the outdoor unit according to claim 1 of the present invention, the electrical component unit 5 is disposed inside the outdoor unit 1 of the air conditioner. In an air conditioner in which a terminal board 24 for connecting an indoor unit and a power line or the like is provided on the outer surface of the electrical equipment frame 20 constituting the shell, the electrical equipment frame 20 is disposed above the terminal board 24. A drip-proof means for preventing water droplets generated on the surface from flowing down to the terminal board 24 is provided.

  The drip-proof structure in the terminal board of the outdoor unit according to claim 2, wherein the drip-proof means is constituted by a ridge or concave rib 30 formed integrally with the electrical component frame 20. Yes.

  The drip-proof structure in the terminal board of the outdoor unit according to claim 3 is characterized in that the rib 30 is formed in a substantially semi-ring shape so as to cover the terminal board 24.

  In the drip-proof structure in the terminal board of the outdoor unit according to claim 4, the electrical component unit 5 supports the reactor 23 below the top plate 25 of the electrical component frame 20, and the reactor 23 of the top plate 25. Further, another electrical component 21 is supported inside the casing, and a terminal board 24 is attached to a hanging portion 26 provided outside the reactor 23 of the top plate 25.

  According to the drip-proof structure in the terminal board of the outdoor unit according to claim 1 of the present invention, the drip-proof means for preventing water droplets generated on the surface of the electrical component frame 20 from flowing down to the terminal board 24 are provided. Since the water droplets are provided, the water droplets are prevented from flowing down to the terminal board 24 by the drip-proof means, and therefore the malfunction of the terminal board 24 due to the water droplets can be prevented.

  According to the drip-proof structure in the terminal board of the outdoor unit according to claim 2, the drip-proof means is constituted by the ridge or concave rib 30 formed integrally with the electrical component frame 20. There is no need to form a drip-proof means with a separate member, and the number of parts is not increased. Therefore, an increase in cost can be suppressed, and the rigidity of the electrical component frame 20 can be improved by forming the rib 30 integrally with the electrical component frame 20 as protrusions or recesses. Further, according to the drip-proof structure in the terminal board of the outdoor unit according to claim 3, the rib 30 is formed in a substantially semi-ring shape so as to cover the terminal board 24, so that it is simply a linear rib. In contrast, the rigidity of the electrical component frame 20 in the vertical and horizontal directions can be further improved, and water droplets can be smoothly dropped downward.

  According to the drip-proof structure in the terminal board of the outdoor unit according to claim 4, the outdoor unit can be made compact by attaching the reactor 23 to the electrical component frame, but there is a problem of increased condensation. In contrast to this, there is an advantage that a certain drip-proof effect can be obtained.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As is well known, an air conditioner is composed of an indoor unit and an outdoor unit, and the outdoor unit is installed outdoors. In FIG. 1, the outdoor unit is partially cut out except for the casing. A perspective view of the machine 1 is shown.

  As shown in FIG. 1, the outdoor unit 1 basically includes a substantially L-shaped heat exchanger 2, a compressor 3, a fan 4, an electrical component unit 5, and the like. A partition plate 7 is erected on the upper surface of the bottom plate 6. One of the partition plates 7 serves as a machine chamber 10 and the other serves as a ventilation chamber 11. A compressor 3 and an electrical component unit 5 are disposed in the machine room 10, and a heat exchanger 2, a fan 4, and the like are disposed in the ventilation chamber 11.

  FIG. 2 shows a side view of the outdoor unit 1 with a part cut away. As shown in FIGS. 1 and 2, a substantially L-shaped side plate 12 is provided so as to cover a part of the side surface and the back surface of the machine room 10 of the outdoor unit 1, and the side plate 12 has an opening 13. Is formed. A connecting portion 14 to which the indoor unit and the refrigerant pipe are connected is positioned below the opening 13, and a part of the electrical component unit 5 is positioned above the opening 13. The opening surface of the opening 13 is covered with a resin cover 15.

  FIG. 3 is a perspective view of the electrical component unit 5. The electrical component unit 5 is disposed above the compressor 3 and supported by a partition plate 7 and a casing (not shown). The electrical component unit 5 includes an electrical component frame 20 constituting an outer shell, a printed circuit board 22 on which electrical components 21 such as a power transistor, a capacitor, and various ICs are mounted, and a reactor 23 that generates high heat. The terminal board 24 is connected to a power line and a signal line from the indoor unit side. The printed circuit board 22, the reactor 23, and the terminal board 24 are supported and fixed to the electrical component frame 20.

  Specifically, the printed circuit board 22 is disposed inside the electrical component frame 20, the reactor 23 is disposed on the lower surface of the top plate 25 of the electrical component frame 20, and the terminal board 24 is also a top plate of the electrical component frame 20. 25 is disposed on the outer surface of a plate-like hanging portion 26 that is integrally bent from the edge of 25. That is, the reactor 23 is supported on the lower side of the top plate 25 of the electrical component frame 20, the other electrical components 21 are supported on the inner side of the casing than the reactor 23 of the top plate 25, and the reactor 23 of the top plate 25 is further supported. A terminal board 24 is attached to a hanging part 26 provided outside the casing. The terminal board 24 is exposed from the opening 13 of the side plate 12, and the power line and the signal line are connected. These power lines and signal lines are supported and fixed by a band 27 provided below the hanging part 26. In addition, the flat top plate 25 and the drooping portion 26 are formed with a plurality of grooves 28 and protrusions 29 in order to ensure rigidity.

  Here, in order to generate high heat, the reactor 23 is arranged away from various electrical components 21 mounted on the printed circuit board 22, so that the reactor 23 has a hanging part in which the terminal board 24 is arranged. It is located close to the inner surface of 26. And by adopting such an arrangement mode, the outdoor unit can be made compact. However, since the reactor 23 is close to the drooping portion 26, dew condensation is likely to occur on the surfaces of the top plate 25 and the drooping portion 26, and the generated water drops drop on the terminal board 24 and cause malfunction. It will be.

  Therefore, in the present invention, as shown in FIG. 3 and FIG. 4, ribs 30 as drip-proof walls are integrally formed at the locations of the hanging portions 26 located above and on both sides of the terminal board 24. The rib 30 has a substantially semi-ring shape and has a shape of a ridge protruding on the outer surface of the hanging portion 26. 5 shows a front view of the electrical component frame 20 in a state in which the terminal board 24 is not provided, and FIG. 6 shows a cross-sectional view taken along the line AA of FIG.

  As described above, by providing the rib 30 protruding outward so as to cover the terminal board 24 above the terminal board 24, when the dew condensation generated at the upper part of the hanging part 26 flows down, It flows down downward along the upper side, and no water droplets adhere to the terminal board 24. Therefore, the terminal board 24 can eliminate malfunction due to water droplets of dew condensation. Further, since the rib 30 is formed integrally with the hanging part 26, the number of parts is not increased, and the rigidity of the hanging part 26 itself can be improved. In particular, when the electrical component frame 20 is made of a thin sheet metal, the electrical component frame 20 can also be reinforced.

  Further, since the rib 30 is formed in a substantially semi-ring shape so as to cover the terminal board 24, the rigidity in the vertical and horizontal directions of the hanging portion 26 of the electrical component frame 20 is further increased, unlike a linear rib. Can be improved. In addition, water droplets are also dripped smoothly.

  In addition, the shape of the rib 30 is not limited to a substantially semi-ring shape as shown in the figure, but may be a substantially U-shape having a substantially square shape or an inclination, or an inclined linear shape. Further, the rib 30 is a protrusion that protrudes outward from the drooping portion 26, but may be a groove having a recess that is recessed toward the inner surface.

It is a perspective view of an outdoor unit in which a part is cut away in an embodiment of the present invention. It is a side view of an outdoor unit with a part cut away in an embodiment of the present invention. It is a perspective view of the electrical component unit in the embodiment of the present invention. It is a front view of the electrical component unit in the embodiment of the present invention. It is a front view of the electrical component unit except the terminal board etc. in embodiment of this invention. It is AA sectional drawing of FIG. 5 in embodiment of this invention.

Explanation of symbols

    1 .... Outdoor unit, 5 .... Electrical component unit, 20 .... Electrical component frame, 21 .... Electrical component, 23 .... Reactor, 24 ... Terminal board, 25 ... ··rib

Claims (4)

  An electrical component unit (5) is disposed inside the outdoor unit (1) of the air conditioner. On the outer surface of the electrical component frame (20) constituting the outer shell of the electrical component unit (5). In the air conditioner provided with a terminal board (24) for connecting a power line or the like from the indoor unit, the terminal board (24) is provided on an outer surface of the hanging part (26) of the electrical component frame (20). In the hanging part (26), a drip-proof means is provided at a position above the terminal board (24) to prevent water droplets from flowing down to the terminal board (24). Drip-proof structure in the terminal board of outdoor unit.   The said drip-proof means is comprised by the protrusion or concave rib (30) integrally formed in the drooping part (26) of the said electrical component flame | frame (20). Drip-proof structure for the terminal board of outdoor units.   The drip-proof structure in the terminal board of the outdoor unit according to claim 2, wherein the rib (30) is formed in a substantially semi-ring shape so as to cover the terminal board (24).   The electrical component unit (5) supports the reactor (23) below the top plate (25) of the electrical component frame (20), and is located more inside the casing than the reactor (23) of the top plate (25). The terminal board (24) is attached to a hanging part (26) provided on the outside of the reactor (23) of the top plate (25) for supporting another electrical component (21). The drip-proof structure in the terminal board of the outdoor unit according to any one of claims 1 to 3.