JP2012145287A - Air conditioner outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner outdoor unit that prevents the entry of water from a fan room into a machine room, while securing an air flow path so as to sufficiently cool a reactor and an electrical substrate.SOLUTION: A series of air flow paths is set so as to cool in order, the electrical substrate 30 and reactor 40 in an electric equipment unit 90 in the process of air inflow from the machine room M toward the fan room F crossing the electric equipment unit 90 in a longitudinal direction by a sucking action of an air blow fan 3 during its normal rotation. The outdoor unit is characterized by providing to an outside-positioned cover 15, a wall face 16 which bends so as to fold back, the movement direction of the air flow flowing to a direction reverse to a cold air flow at normal rotation generating by the reverse rotation of the air blow fan 3 by covering with a double cover so that the directions to open are reversed by 180° in a longitudinal direction in the fan room F side of a channel between the unit 90 abd the fan room F.

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a cooling structure for an electrical board and a reactor installed in the outdoor unit.

  The outdoor unit of the air conditioner is divided into a fan room in which the blower fan and heat exchanger are located and a machine room in which the compressor and refrigerant piping are located by the partition plate standing upright on the bottom plate. It has been. An electrical unit that houses electrical and electronic components for controlling the operation of the air conditioner is disposed mainly in the upper part of the machine room. The electrical component unit includes an inverter board that includes an inverter circuit that controls the operation of the compressor and a plurality of electrical and electronic components mounted thereon, and a terminal block that relays and connects power lines and signal lines between the electrical board and the indoor unit. A reactor for improving the power factor of the input power supply is included.

  The reactor is a component having a weight larger than that of other electric and electronic components to be mounted, because the core is a laminated electromagnetic steel sheet and a coil such as a copper wire is wound around the core. In recent years, air conditioners have been expanded in capacity (capacity) with the same unit size (the size of the box body) in order to be able to accommodate a larger room, and the current of the input power supply has increased accordingly. Therefore, the reactor is also increased in size and weight. Since the reactor is heavy as described above, in the outdoor unit, it is independent from the electrical board and terminal block, and the side surface of the sheet metal frame that forms the outer frame of the rigid electrical component unit, and the side surface of the partition plate described above It is often attached to.

  As a conventional outdoor unit with a weighted reactor, it has a suspension part suspended at the upper end of the partition plate at the upper end part, and has a hollow or box shape with a gap between the side surfaces of the partition plate There is one that attaches a reactor to a partition plate via a reactor attaching member that is a structure. Thus, by making the reactor mounting member into a hollow or box-shaped structure, the strength of the combination of the partition plate and the reactor mounting member is increased, and bending deformation of the partition plate due to the weighted reactor is prevented. (For example, see Patent Document 1)

JP 2009-186109 A (columns 0014 to 0036, FIGS. 2 to 6 etc.)

  Since the reactor is a heating element, it should be cooled for efficient operation. In Patent Document 1, slits are provided in place of reinforcing rib-shaped protrusions that extend in the vertical direction on the surface facing the reactor mounting member of the partition plate via a gap, and air flow toward the fan chamber There is a description that the reactor may be cooled. However, there is no specific disclosure of the air flow for cooling the reactor, and it has been difficult to obtain a sufficient cooling effect for the reactor only by providing the slit in the partition plate.

  In addition, when the operation of the air conditioner is stopped, rainwater that has entered the inside of the fan unit of the outdoor unit is submerged from the slit of the partition plate into the machine room, and is disposed inside the machine room including the reactor. There was concern that the electrical board would get wet.

  The present invention has been made to solve the above-described problems. The reactor and the electrical board can be sufficiently cooled to ensure efficient operation of the reactor and the electrical board, and from the fan chamber to the machine room. It is an object of the present invention to provide an outdoor unit of an air conditioner that prevents water from entering and prevents moisture from adhering to an electrical board or reactor.

  An outdoor unit of an air conditioner according to the present invention includes a box that forms an outer shell, a machine room in which a compressor is arranged in the left-right direction inside the box, and a fan chamber in which a heat exchanger and a blower fan are arranged An air conditioner having an electrical component board, a reactor, and an electrical component unit that supports these and constitutes an outer frame. The frame is in contact with the machine room side surface of the partition plate, and is provided on the first side wall in which a vent hole is formed, and on the side of the non-partition plate spaced a predetermined distance from the first side wall in the left-right direction. A reactor that supports the reactor on an inward surface of the first side wall, the second side wall being located and having a ventilation hole formed therein, and a support portion that supports the electrical substrate between the first side wall and the second side wall. The mounting member is fixed. The Kuta mounting member has a bulging portion that has standing walls in the three directions of the upper side, the lower side, and the front side in the vertical direction, and that protrudes inward of the frame including the rear side end portion. A flat surface is formed on the top of the reactor, and a reactor mounting surface to which the reactor is mounted, is connected to the base of the standing wall, and is formed in a planar shape extending over the upper, lower and front sides of the bulging portion. A fixed portion in contact with the inwardly facing surface, and the bulging portion and the first side wall form a box-like space that communicates with the vent hole of the first side wall and opens toward the back side, and The plate is provided on the communication hole facing the vent hole on the first side wall and the surface on the fan chamber side, projects inward of the fan chamber to cover the communication hole, and faces either the front side or the rear side. A first cover that opens, and a first distance away from the first cover by a predetermined distance in the left-right direction. A second cover that is provided on the surface of the fan chamber so as to cover the opening and opens in a direction opposite to the opening of the first cover, and provided in the second cover, in the front-rear direction and the opening of the first cover. A water-preventing wall that opposes at a predetermined distance and closes the opposite side of the opening of the second cover, and the box-shaped space is between one end of the electrical board on the partition plate side and the partition plate, and It opens to the back side at a position that overlaps with the electrical board in the left-right direction, and the ventilation hole of the second side wall is between the other end of the electrical board on the side opposite to the partition plate and the side wall of the box and in the left-right direction At the position where it overlaps the electrical circuit board, and when the blower fan is rotating forward, the air blower fan sucks it so that it passes from the machine room through the ventilation hole and flows into the electrical unit and crosses the electrical circuit board in the left-right direction. After passing, it enters the space, passes through the vent and the communication hole, 2 An air flow flowing out from the opening of the cover into the fan chamber is generated, and when the blower fan rotates in reverse, the air flow generated by the reverse rotation flows into the second cover from the opening of the second cover, Passing through the space formed between the second covers, the flow direction can be bent by the infiltration prevention wall of the second cover.

  According to the present invention, it is possible to secure an air flow that can sufficiently cool the reactor and the electrical board, and to maintain the efficient operation of the reactor and the electrical board, and to prevent the flooding from the fan chamber to the machine room. A highly efficient outdoor unit of an air conditioner can be obtained.

It is an external appearance perspective view of the outdoor unit in Embodiment 1 of this invention. It is a perspective view which shows the internal structure of the outdoor unit of FIG. It is the external appearance perspective view which looked at the outdoor unit of FIG. 1 from another direction. It is a cross-sectional view which shows the internal structure of the outdoor unit of FIG. It is the perspective view which looked at the electrical equipment unit in the outdoor unit of FIG. 1 from the front side. It is the perspective view which looked at the electrical component unit of FIG. 5 from the back side. It is a disassembled perspective view to the attachment state of the electrical equipment board | substrate in the electrical equipment unit of FIG. It is a perspective view of the flame | frame in the electrical equipment unit of FIG. It is the perspective view which looked at the flame | frame of FIG. 8 from another direction. FIG. 6 is a perspective view of a single unit of a reactor mounting member in the electrical unit of FIG. 5. It is the perspective view which looked at the reactor attachment member of FIG. 10 from another direction. It is a top view of the reactor attachment member of FIG. It is a perspective view of a frame in the state where a reactor attachment member was attached. It is the cross-sectional perspective view which looked at the reactor attachment member from the back side in the state fixedly attached to the flame | frame. It is the single-piece | unit perspective view which looked at the upper part of the partition plate in the outdoor unit of FIG. 1 from the machine room side. It is the single-piece | unit perspective view which looked at the upper part of the partition plate of FIG. 14 from the fan chamber side. It is the perspective view which looked at the upper part of the partition plate in the outdoor unit of FIG. It is the perspective view which looked at the upper part of the partition plate in the state where the 2nd cover was mounted from the front upper part by the side of a fan room. It is the perspective view which looked at the partition plate upper part of FIG. 18 from the back upper surface by the side of a fan chamber. It is a cross-sectional view of the vicinity of the electrical component unit in the outdoor unit of FIG. It is the perspective view which looked at the top | upper surface panel of the outdoor unit of FIG. 1 from the back side. It is explanatory drawing of the airflow produced by the suction effect | action by the normal rotation of the ventilation fan in the outdoor unit of FIG. It is explanatory drawing of the airflow produced by the reverse rotation of the ventilation fan in the outdoor unit of FIG.

Embodiment 1 FIG.
FIG. 1 is an external perspective view of an outdoor unit 100 of an air conditioner showing Embodiment 1 of the present invention, and FIG. 2 shows an internal configuration by removing a part of a box of the outdoor unit 100. FIG. 3 is an external perspective view of the outdoor unit 100 as viewed from the rear, and FIG. 4 is a cross-sectional view of the outdoor unit 100. This outdoor unit 100 is installed outdoors, and is connected to an indoor unit (not shown) through a refrigerant pipe to constitute a refrigeration cycle. The indoor unit is also connected to a power line or a signal line for operation control of the refrigeration cycle. The outdoor unit 100 and the indoor unit constitute a so-called separate type air conditioner. In these drawings, electric wirings are omitted.

  The box that forms the outline of the outdoor unit 100 is configured by combining a plurality of sheet metal parts, and the bottom plate 1 (see FIG. 2) that bears the bottom of the box has an inside (box A partition plate 20 that divides the inside of the body into left and right is installed upright. The partition plate 20 divides the fan chamber F having the blower fan 3 and the heat exchanger 2 and the machine chamber M in which the compressor 4, the refrigerant pipe, and the electrical component unit 90 are disposed. As shown in FIG. 2, in the fan chamber F, the long side part of the substantially L-shaped heat exchanger 2 is located on the back side of the outdoor unit 100, and the blower fan 3 is located on the front side thereof. When the outdoor unit 100 is viewed from the front, the fan chamber F is located on the left side and the machine room M is located on the right side.

  The box of the outdoor unit 100 has a left front panel 6 that covers the front of the fan chamber F, a front wall, and a side wall in addition to the bottom plate 1 having the legs 1a that support the outdoor unit 100 on the bottom surface. An L-shaped right front panel 7 that covers the front and right front portions, an L-shaped rear panel 8 that has a front wall and side walls and covers the rear and right rear portions of the machine room M, and the left side of the fan chamber F The left side panel 9 that covers the surface and the top panel 5 that covers the upper surface of the outdoor unit 100 straddling the fan chamber F and the machine room M are all made of sheet metal. Note that these panels are not separated individually, and some of them may be integrally formed.

  Here, as shown in FIG. 1, in the description of this embodiment, the direction in which the left front panel 6 faces the outside is defined as the front side, and the opposite direction is defined as the back side. And the direction which connects a front side and a back side is called the front-back direction. Further, the direction in which the machine room M is located when viewed from the front is the right side, and the direction in which the fan room F is located is the left side. The front side may be described as the front, the back side as the rear, the right side as the right direction, and the left side as the left direction.

  The left front panel 6 is formed with a circular outlet (not shown) that has a bell mouth 6a (see FIG. 4) that protrudes inward in a cylindrical shape and guides the air blown from the blower fan 3 and opens. The air outlet 6b is covered with an air outlet grill 6b which is formed of bars arranged at predetermined intervals and is open in a lattice shape. The left side panel 9 is opposed to the short side portion of the substantially L-shaped heat exchanger 2, and a lattice-like opening (not shown) is formed to allow the air flow toward the heat exchanger 2 to pass through. ing.

  As shown in FIG. 3, a suction grill 8 a serving as an airflow inlet for cooling the electrical component unit 90 is provided at the lower portion of the rear panel 8. Here, the suction grill 8a is provided on the back wall of the rear panel 8, but may be provided on the side wall. The suction grill 8a is integrally formed with the rear panel 8 by louver processing. On the inward surface side facing the inside of the machine room M, a plurality of laterally elongated horizontal holes are arranged in the vertical direction, and the outward surface facing the outdoors. On the side, the cover body swells so as to individually cover the lateral holes, and each of the cover bodies opens only downward. The suction grill 8a may be integrally formed by bending the lance without squeezing and inflating after cutting the cover body.

  FIG. 2 is a perspective view showing a state in which the top panel 5, the left front panel 6, and the right front panel 7 are removed from the sheet metal box in order to explain the internal configuration of the outdoor unit 100. As shown, the interior of the outdoor unit 100 has the machine room M on the right side and the fan room F on the left side with the partition plate 20 as a boundary. The interior of the outdoor unit 100 is divided into a fan chamber F and a machine chamber M in the left-right direction by a partition plate 20 that stands upright on the bottom plate 1.

  The bottom plate 1 is made of sheet metal, and is formed with a flange portion 1b that is bent upward over the entire circumference. The partition plate 20 is also made of sheet metal, and is fixed to the upper surface of the bottom plate 1 with screws. On the front side, it is screwed to the flange portion 1b of the bottom plate 1, and on the back side, it is screwed to an end plate attached to the machine chamber side end portion (right end portion) of the heat exchanger 2. Thus, the partition plate 20 is installed so as to connect the front surface and the back surface inside the outdoor unit 100.

  In the outdoor unit 100, as shown in FIG. 4, the right end portion of the heat exchanger 2 overlaps the left side portion of the electrical component unit 90 on the back side of the electrical component unit 90 in the front-rear direction. , Proceed from the front side to the back side, bend rightward once on the back side of the electrical component unit 90, proceed between the heat exchanger 2 and the electrical component unit 90, and back again near the right end of the heat exchanger 2 Bent to the end plate at the right end of the heat exchanger 2 and has a bent shape.

  A blower fan 3 is installed in the center of the front side of the fan chamber F, and a fan motor 3a (see FIG. 4) for rotating the blower fan 3 is positioned behind the fan. The fan motor 3a is supported by a support 10 (see FIG. 2) fixed on the bottom plate 1. The support column 10 is substantially L-shaped, and its long side portion faces the inside of the heat exchanger 2 and the short side portion faces the inner surface of the top panel 5 to support the top panel 5 in the vertical direction. ing. The blower fan 3 of the indoor unit 100 is a propeller fan.

  As shown in FIG. 2, the machine room M is provided with a compressor 4 that compresses and discharges the refrigerant in the lower portion and circulates the refrigerant in the refrigeration cycle. The compressor 4 is fixed on the bottom plate 1 through vibration-proof rubber. In the upper part of the machine room M, an electrical component unit 90 is disposed. In the space in the machine room M below the electrical unit 90 and on the side of the compressor 4, an expansion valve and a four-way valve constituting the refrigeration cycle, a refrigerant pipe connecting the refrigeration cycle, and a connection valve connecting the refrigerant pipe connected to the indoor unit Etc. are arranged.

  Next, the electrical component unit 90 will be described. FIG. 5 is a perspective view showing the overall configuration of the electric unit 90, and FIG. 6 is a perspective view of the electric component unit 90 as seen from the back side. The electrical unit 90 includes an electrical board 30, a reactor 40, a reactor mounting member 70 on which the reactor 40 is installed and supports the reactor 40, a terminal block 85, and a sheet metal frame that fixes and supports them and forms an outer frame of the electrical component unit 90. 50. In addition, wiring clips 91 for fastening various electric wirings are attached in some places. In FIG. 5, a wiring clip 91 extending linearly obliquely rounds the electric wiring by rounding it. Here, the state before rounding is shown.

  Hereinafter, the definition of the direction used when describing the electrical unit 90 is the same as the definition used for the outdoor unit 100 on the basis of the state where the electrical unit 90 is installed in the outdoor unit 100. That is, as shown in FIG. 5, in the state where the outdoor unit 100 is installed, the direction of the front side of the outdoor unit 100 is the front side, the front side, or the front side, and the opposite direction. This direction is the back side, the back side, or the back side. Further, facing the front of the electrical unit 90, the right direction is the right side, and the left direction is the left side.

  The electrical board 30 on which the electrical and electronic components for controlling the operation of the air conditioner are mounted has the back side (near the rear side) of the frame 50, and the mounting surface of the main electrical and electronic parts faces the front side (front side). Installed vertically. Here, the vertically placed state refers to a state in which the printed board on which the electrical and electronic components of the electrical board 30 are mounted is substantially parallel to the vertical direction. Further, here, the electrical board 30 does not indicate only the printed board, but indicates a state in which various electric and electronic components are mounted on the printed board, and the printed board and the electrical mounted on the board. The electronic component 30 is also referred to as an electronic board 30.

  A reactor 40 for improving the power factor of the input AC power supply is disposed in front of the electrical board 30 via a space. The reactor 40 includes a core 41 on which electromagnetic steel plates are laminated, a coil 42 such as a copper wire wound around the core 41, and a metal base plate 43 that is welded and fixed to an end surface of the core 41. By fixing the base plate 43 to the reactor mounting member 70 made of sheet metal, the reactor 40 is fixed to the frame 50 via the reactor mounting member 70.

  The base plate 43 has a length in the vertical direction longer than the vertical width of the core 41, a flat portion protruding above the upper end of the core 41 in the upper portion, and a flat portion protruding downward from the lower end of the core 41 in the lower portion. Bolt holes (not shown) are formed in the upper and lower sides on the front side of the protruding flat portion. The length of the base plate 43 in the front-rear direction is the same as that of the core 41. In addition, a terminal block 85 that relays and connects a power line from the indoor unit and a signal line (not shown) for communication control to the mounting board 30 is installed in front of the lower portion of the frame 50 so as to face obliquely upward. The

  FIG. 7 is an exploded perspective view of the electrical component unit 90 until the electrical board 30 is attached. As shown in FIG. 7, the electrical circuit board 30 has a surface around the printed circuit board on which various electrical and electronic components are mounted and a surface opposite to the mounting surface of the printed circuit board (in this case, facing the back surface on the anti-mounting surface). It is covered with a resin substrate cover 31 and is fixed to the frame 50 in a vertically placed state on the back side of the frame 50 via a resin substrate holder 32 in that state. The claw provided on the substrate cover 31 is engaged with the electrical substrate 30, so that the substrate cover 31 is attached to the electrical substrate 30. This board cover 31 is attached mainly to prevent small animals such as geckos from entering the solder surface, which is the opposite side of the mounting surface of the electrical board 30 from the outside, and the occurrence of a short circuit due to the invading small animals. It is something to prevent.

  As shown in FIG. 7, when the electrical board 30 is attached to the frame 50 via the board holder 32, the side wall (first side wall 53, see FIG. 8) already positioned on the partition plate 20 side of the frame 50 is The reactor mounting member 70 is fixed. However, since the electrical substrate 30 including the substrate holder 32 and the substrate cover 31 and the reactor mounting member 70 are in a positional relationship such that they do not overlap in the front-rear direction, the electrical substrate 30 is attached when the electrical substrate 30 is mounted on the frame 50. And the reactor mounting member 70 do not come into contact with each other. Details of the reactor mounting member 70 will be described later.

  Next, the frame 50 that is a housing of the electrical component unit 90 will be described. FIG. 8 and FIG. 9 are single perspective views of the frame 50, respectively, and the viewing directions are different. FIG. 8 is a perspective view as viewed from the left, and FIG. 9 is a perspective view as viewed from the right. The frame 50 is configured by combining a plurality of plate-like sheet metal parts by spot welding or engaging claws.

  A plate-like first side wall 53 and second side wall 52 stand upright along the left and right ends of the bottom portion 51 forming the bottom surface. The first side wall 53 is located on the left side, that is, on the partition plate 20 side, and the second side wall 52 is on the right side, that is, on the opposite side of the partition plate 20 spaced apart from the first side wall 53 in the left-right direction. Located on the partition side. Hereinafter, the second side wall 52 is referred to as a right side wall 52, and the first side wall 53 is referred to as a left side wall 53. The electrical board 30 is installed vertically between the right side wall 52 and the left side wall 53.

  The front side end position of the right side wall 52 is the smoothing capacitor 33 (used in the inverter circuit of the compressor 4) which is the highest among the electric and electronic components mounted on the electrical board 30 and protrudes most to the front side. It is the same as the front end position (front end position) or slightly forward. A flange 54 is formed on the front edge of the right side wall 52. The flange 54 has a flat surface that is bent at a substantially right angle to the outside, that is, to the right.

  Immediately behind the flange 54, a ventilation hole 55 is formed which includes a large number of holes penetrating the right side wall 52 in the left-right direction. The ventilation holes 55 are configured by arranging a plurality of rows of holes (diameter of about 5 mm) arranged at predetermined intervals in the vertical direction so that the positions of the holes in the rows adjacent in the front-rear direction are shifted vertically. In this way, by arranging a plurality of holes spaced apart from each other to form the ventilation hole 55, it is possible to ensure both a sufficient ventilation area and a sufficient rigidity of the frame 50 so that the necessary air flow can be sufficiently circulated. Plays. The operation of the ventilation hole 55 will be described later.

  In addition, a wiring passage notch 64 is formed in the upper portion of the right side wall 52 through which an electrical wiring connected to the electrical board 30 from the outside of the electrical unit 90, such as a lead wire of a temperature sensor attached to the heat exchanger 2, for example. Has been. The resin wiring protection cover 13, which is a separate part, is fitted into the notch 64 (see FIG. 6).

  The front side end of the bottom portion 51 is once bent obliquely downward, and an inclined surface 56 is formed at the bent portion so as to face obliquely upward in the front. A terminal block installation surface 57 for attaching and fixing the terminal block 85 is formed at the approximate center of the inclined surface 56 in the left-right direction. The terminal block installation surface 57 is inclined so as to face upward by approximately 45 degrees.

  The left side wall 53 has a front end near the rear end of the inclined surface 56 of the bottom portion 51 (a position where the downward inclination starts), and is wider than the right side wall 52 in the front-rear direction. A reactor mounting member 70 described later is fixed to the left side wall 53 on the inward surface, and the outward surface is opposed to and in contact with the partition plate 20. A vent hole 58 having the same configuration as the vent hole 55 formed in the right side wall 52 is also formed in the left side wall 53. Here, the name of the vent hole 58 is different from that of the vent hole 55, but the name is different for the sake of clarity of explanation, and the configuration is the same. Thus, it is the same in that both the securing of the ventilation area where the necessary air flow can be sufficiently circulated and the securing of the rigidity of the frame 50 are achieved.

  In addition, two positioning projections 63 are provided on the upper and lower portions of the left side wall 53 at a predetermined distance in the front-rear direction. This is for positioning a reactor mounting member 70 to be described later, and is convex in the right direction which is the inner side of the frame 50. Further, on the front side (front side) of the left side wall 53, a substantially trapezoidal locking hole 55 is formed by being punched at two locations apart in the vertical direction and having an upper base shorter than the lower base.

  A rear portion 59 that closes the rear of the frame 50 is formed on the back side of the frame 50, and the left and right ends of the rear portion 59 are in contact with the rear ends of the left side wall 53 and the right side wall 52, respectively. Is in contact with the rear end of the bottom portion 51. A roof portion 60 is provided across the back side portions of the right side wall 52 and the left side wall 53 and in contact with the upper end of the back side portion of each of the right side wall 52 and the left side wall 53 and the upper end of the back surface portion 59.

  The roof portion 60, the back surface portion 59, the left side wall 53, the right side wall 52, and the bottom portion 51 form a box-shaped space whose front is open, and the substrate holder 32 that supports the electrical circuit board 30 is stored in the box-shaped space. Is done. By providing the roof part 60, the back part 59, the left side wall 53, and the right side wall 52 can be prevented from falling with the lower end as a fulcrum, and the rigidity of the frame 50 is increased. Since the top panel 5 covers the upper part of the electrical component unit 90, the roof portion 60 does not need a function of covering all the upper portion of the electrical component unit 90.

  The frame 50 may be formed by sheet metal molding of the back portion 59, the left side wall 53, the right side wall 52, the bottom portion 51, and the roof portion 60 and combining them with each other. Alternatively, sheet metal molding may be performed. At the front end of the bottom portion 51 (located on the front side end surface below the inclined surface 56 and the terminal block installation surface 57) and on the right end side of the right side wall flange 54 (including the right end of the inclined surface 56). The elastic member 61 made of foamed resin is stuck continuously. At the edge of the bottom portion 51 to which the elastic member 62 is attached, a flange bent downward at a substantially right angle is formed, and the elastic member 61 is attached to the outward surface of the flange with an adhesive or the like.

  At the center in the left-right direction of the front end of the bottom portion 51, a recess 62 that is recessed rearward from the other front edges is formed. The recess 62 is provided with a width in the left-right direction equivalent to that of the terminal block installation surface 57 so as to substantially overlap the terminal block installation surface 57 in the front-rear direction. The elastic member 62 is continuously attached to the front end of the recess 62.

  Next, the reactor mounting member 70 fixed to the inward surface of the left side wall 53 of the frame 50 will be described. Note that the inward surface of the left side wall 53 is the surface of the left side wall 53 facing the right side wall 52 of the left and right sides, and the opposite side facing the partition plate 20 is outward. Surface. FIG. 10 and FIG. 11 are each a perspective view of the reactor mounting member 70, and the viewing directions are different. 10 is a perspective view seen from the front side, and FIG. 11 is a perspective view seen from the back side. FIG. 12 is a top view of the reactor mounting member 70.

  The reactor mounting member 70 is an integrally molded product by sheet metal processing. Two hooks 71 are formed in the front-rear direction so that the reactor mounting member 70 can be suspended by bending. The hook 71 extends in the left direction, which is outside the electric component unit 90. In the middle of the reactor mounting member 70 in the up-down direction (here, substantially in the center), the bulge protrudes and protrudes in the direction opposite to the direction in which the hook 71 extends, that is, in the right direction that is the inward direction of the electrical component unit 90 (frame 50) A portion 72 is formed, and a flat reactor mounting surface 73 for fixing and supporting the reactor 40 is formed on the top of the bulging portion 72. The bulging portion 72 swells including an end on the back side, and the three directions of the upper side, the lower side, and the near side (front side) are closed by standing walls 74, respectively. That is, the reactor mounting member 70 has standing walls in the three directions of the upper side, the lower side, and the front side in the middle of the vertical direction of the reactor mounting member 70 and protrudes inward of the frame 50 including the rear side end. And a reactor mounting surface 73 formed in a planar shape on the top of the expanding portion 72.

  In three directions around the bulging portion 72 (upper, lower, front side), a planar fixing portion 75 is continuously formed across the three-way work. The standing wall 74 is connected in three directions to the fixing portion 75 at the base 74a and to the mounting surface 73 on the tip side. Here, the root 74a of the upright wall 74 is a side that is a base point of the protruding bulging portion 72 (see FIG. 10). The standing wall 74 is inclined so as to spread from the mounting surface 73 toward the fixed portion 75. The bulging portion 72 has a standing wall 74 in three directions and a mounting surface 73 that is a top portion. The fixed portion 75 is formed with a plurality of ribs 76 that protrude in the protruding direction of the bulging portion 72. In addition, a rib 77 that protrudes in a direction opposite to the protruding direction of the bulging portion 72 is also formed on the mounting surface 73. These ribs 76 and 77 are for increasing the rigidity of the reactor mounting member 70.

  The mounting surface 73 has an upper claw 78 extending in the L-shaped cross section at the upper part on the back side and extending to the front side, and a lower claw 79 extending in the L-shaped cross section at the center of the lower part from the mounting surface 73. These are formed so as to protrude and engage with a base plate 43 welded and fixed to the end surface of the core 41 of the reactor 40. Screw holes 80 are formed on the upper and lower sides of the front side so as to overlap the bolt holes formed in the base plate 43. Further, a protrusion 81 for preventing rattling when the reactor 40 is attached is provided behind the rib 77. The protrusion 81 is convex with respect to the mounting surface 73.

  The fixing portion 75 is provided with four marks 82 for notifying spot welding locations, and one positioning hole 83 on the upper and lower sides with the bulging portion 72 interposed therebetween. And, as shown in FIG. 12, the reactor mounting surface 73 is not parallel to the fixed portion 75, and is clockwise so as to move away from the fixed portion 75 toward the rear end (back side). It is inclined at a predetermined acute angle. In this attachment member 70, the attachment surface 73 is inclined about 20 degrees clockwise with respect to the fixed portion 75.

  The reactor attachment member 70 is attached and fixed to the left side wall 53 of the frame 50 prior to mounting of the electrical component board 30 and the terminal block 85 when the electrical component unit 90 is assembled. In a state where the fixing portion 75 is in contact with the inward surface of the left side wall 53 of the frame, the fixing is performed by performing spot welding at four locations where the marks 82 are present. In this spot welding, the positioning of the reactor attachment member 70 with respect to the left side wall 53 of the frame is performed by fitting two positioning holes 83 on substantially diagonal lines in advance into the positioning projections 63 of the left side wall 53 of the frame. The elastic member 61 of the frame 50 is attached to the bottom portion 51 before the reactor mounting member 70 is fixed.

  FIG. 13 is a perspective view of a state in which the reactor attachment member 70 is attached and fixed to the left side wall 53 by spot welding. The bulging portion 72 of the reactor mounting member 70 protrudes inside the electric component unit 90, that is, inward of the frame 50. In this state, the vent hole 58 of the left side wall 53 of the frame is covered with the bulging portion 72 of the reactor mounting member 70 over the entire area, and the back surface of the reactor mounting surface 73 faces the vent hole 58.

  FIG. 14 is a cross-sectional perspective view of the reactor mounting member 70 as viewed from the back side with the reactor mounting member 70 mounted and fixed to the frame left side wall 53 (the left side wall 53 is a cross section). However, FIG. 14 is a cross-sectional view in a state in which an electrical component unit 90 to be described later is mounted on the upper portion of the machine room M, and includes a cross section of the partition plate 20. As shown in FIG. 14, the bulging portion 72 of the reactor mounting member 70 is surrounded by the bulging portion 72 and the frame left side wall 53 on the concave side of the bulging portion 72 (on the opposite side of the mounting surface 73). A box-like space 11 is formed in which the rear side end portion opens toward the back side. That is, the bulging portion 72 and the frame left side wall 53 cooperate to form a box-shaped space 11. This space 11 has a substantially trapezoidal shape in which the cross-sectional shape in the left-right direction has an upper base on the mounting surface 73 side of the reactor mounting member 70 and a lower base on the left side wall 53 side, and opens toward the back side. .

  Furthermore, the mounting surface 73 has a predetermined acute angle (20 degrees in this case) in the right direction from the near side (front side) to the far side (rear side) with respect to the left side wall 53 of the frame in contact with the fixing portion 75. Since it is inclined, the height of the substantially trapezoidal cross-sectional shape (the width in the left-right direction of the space 11) becomes smaller from the back side toward the front side. The opening at the far end of the bulging portion 72 serves as the entrance 12 to the space 11. Since the bulging portion 72 covers the entire vent hole 58 of the left side wall 53, the box-shaped space 11 formed on the concave side of the bulging portion 72 has not only the inlet 12 but also the left side wall 53. The entire formed vent hole 58 communicates.

  After reaching the state shown in FIG. 13, that is, after the reactor mounting member 70 is fixed to the frame 50 by spot welding, the electrical board 30 is fixed vertically on the back side of the frame 50. As shown in FIG. 7, to fix the electrical board 30 to the frame 50, first, the board holder 32 is bolted to the back surface portion 59 of the frame 50, and the board holder 32 is mounted around the electrical board 30. This can be achieved by fixing the substrate cover 31 with bolts. As described above, the electrical board 30 is supported in a vertically placed state on the back surface portion 59 between the right side wall 52 and the left side wall 53 of the frame 50. The back surface portion 59 serves as a support portion that supports the electrical board 30.

  The next process of assembling the electrical unit 90 is the attachment of the reactor 40 or the attachment of the terminal block 85, but either may be the first. The mounting and fixing of the terminal block 85 is completed by fixing the terminal block 85 to the terminal block installation surface 57 formed in front of the frame bottom portion 50 with bolts. Since the terminal block installation surface 57 faces 45 degrees obliquely upward on the front side, the terminal block 85 also has a surface to which the wiring is connected obliquely upward 45 degrees forward.

  The reactor 40 is held by the frame 50 by being fixed to the reactor mounting member 70. The reactor 40 is fixed to the reactor mounting member 70 in the following procedure. With the reactor 40 in the correct orientation, the rear edge (back side edge) of the surface opposite to the core of the base plate 43 is brought into contact with the front edge (front side edge) of the reactor mounting surface 73, and both are kept in contact with each other. Slide the reactor 40 back.

  When the base plate 43 is slid, the lower part 79 of the rear end face (the end face on the back side) of the base plate 43 (the part projecting downward from the core 41) first pushes up the lower claw 79 extending upward from the side to the right direction. The lower part of the bottom enters the lower claw 78. If the slide movement is continued while the lower part of the base plate 43 is inserted into the lower claw 78, the upper part of the rear end surface of the base plate 43 (the part protruding upward from the core 41) is now located on the back side of the mounting surface 73. The upper claw 78 extending to the side is pushed rightward from the claw tip (front end) side to enter the upper claw 78 and abuts on the inner side of the base (L-shaped short side portion) of the upper claw 78. The slide movement ends when it hits.

  At this time, the lower center of the base plate 43 enters the lower claw 79 and the upper part of the back side enters the upper claw 78, and the elastic force that presses the base plate 43 by the lower claw 79 and the upper claw 78 against the reactor mounting surface 73. (Spring force) is received. Further, the lower end surface of the base plate 43 is in contact with the inner side of the lower claw 79 at the base (L-shaped short side portion), and the weight of the reactor 40 is supported by the base of the lower claw 79. Thus, the reactor 40 is temporarily fixed to the reactor mounting surface 73 of the reactor mounting member 70 by the upper tab 78 and the lower tab 79. Since the weight of the reactor 40 acts at least at the base of the lower claw 79, the lower claw 79 has a claw width (length in a direction perpendicular to the direction in which the claw extends) longer than that of the upper claw 78.

  In the temporarily fixed state, when the center of the lower end surface of the base plate 43 is in contact with the base of the lower claw 79 and the upper end of the rear end surface of the base plate 43 is in contact with the base of the upper claw 78, Two bolt holes overlap with two screw holes 80 formed on the front side of the reactor mounting surface 73 of the reactor mounting member 70. Therefore, the bolts 44 (see FIG. 5) are passed through the bolt holes in the upper and lower two places with respect to the reactor 40 in the temporarily fixed state, and the bolts 44 are screwed into the screw holes 80 of the reactor mounting member 70 to thereby form the base plate 43. And the reactor mounting member 70 are fastened. Thereby, temporary fixation is cancelled | released. Thus, the reactor 40 is fixed to the reactor mounting member 70 and is fixed to the frame 50 via the reactor mounting member 70.

  Further, when the reactor 40 is fixed, the projection 81 protruding from the reactor mounting surface 73 is against the base plate 43 by the elastic force of the upper claw 78 and the lower claw 79 and the fastening force of the bolt 44. By being pushed in the convex direction (the direction of the space 11), the bulging portion 72 having the reactor mounting surface 73 is elastically deformed toward the space 11 and returns to the direction of the reactor 40 (spring force). Give rise to Since the elastic force of the bulging portion 72 always acts to press the reactor mounting member 70 against the reactor 40, the reactor 40 comes into contact with the reactor mounting member 70 without rattling, and the both are firmly and firmly fixed. Is obtained.

  Thereafter, the electrical component unit 90 is completed by fixing the plurality of wiring clips 91 to predetermined positions. FIG. 5 shows the electrical unit 90 in a state where the assembly is completed. The electrical unit 90 is attached and fixed to the upper part of the machine room M of the outdoor unit 100. The electrical unit 90 is attached to the upper part of the machine room M by fixing a plurality of claws and bolts to the partition plate 20 and the rear panel 8. When the electrical unit 90 is mounted, the partition plate 20 and the compressor 4 and the refrigerant pipes below the machine room M are already mounted, and the rear panel 8 and the left side panel 9 of the box are It is installed on the bottom plate 1.

  FIG. 15 and FIG. 16 are each a single perspective view showing the upper part of the partition plate 20, and the viewing directions are different. 15 is viewed from the direction of the machine room M, and FIG. 16 is viewed from the direction of the fan room F. The outwardly facing surface of the left side wall 53 of the electrical component unit 90 is in contact with the surface on the machine room M side of the central partition 21 that extends in the front-rear direction in a substantially vertical state with the long side portion of the heat exchanger 2. In addition, the outward surface of the frame back surface portion 59 of the electrical component unit 90 is in contact with the surface on the machine room M side of the back side partition portion 22 that extends in the left-right direction in a substantially parallel state with the long side portion of the heat exchanger 2.

  The upper end of the central partition 21 is bent toward the fan chamber F, and an upper flange 23 having a predetermined width (horizontal direction) is formed. The width is a little shorter than the suspension width of the hook 71 of the reactor mounting member 70. A substantially rectangular communication hole 24 that is elongated in the vertical direction is provided at the approximate center of the central partition 21 in the front-rear direction. The communication hole 24 enables circulation between the machine room M and the fan room F. On the front side of the communication hole 24, a claw 25 that protrudes toward the machine room M and extends upward is formed at a predetermined interval in the vertical direction.

  As shown in FIG. 16, a first cover 26 that protrudes toward the fan chamber F side and covers the communication hole 24 is provided on the fan chamber F side of the central partition portion 21. The first cover 26 has an opening 27 only toward the front side. The first cover 26 of the partition plate 20 is integrated with the partition plate 20 so as to swell along the peripheral edge in the three directions of the communication hole 24 excluding the opening 27 by louvering, that is, in contact with the peripheral edge in the three directions. Formed. By cutting the portion that becomes the opening 27 and then inflating it so as to protrude toward the fan chamber F, the communication hole 24, the first cover 26, and the front opening 27 are formed almost simultaneously. The first cover 26 is not integrally formed by louver processing, and a separate cover part that opens only toward the front side and covers the communication hole 24 is fixed to the partition plate 20 by bolt fixing or claw fixing. The first cover may be attached to the fan chamber F side.

  When the electrical unit 90 is mounted in the machine room M, the electrical unit 90 is lowered from above the machine room M, for example, the tab 25 formed extending upward from the partition plate 20 is placed on the left side of the frame. The plurality of claws and the holes are engaged with each other by, for example, being inserted into the locking holes 65 of the wall 53 to be in a fixed state. The claw fixing is performed not only on the frame left side wall 53 but also on the frame back surface portion 59 and the flange 54 of the frame right side wall 52. The outwardly facing surface of the frame left side wall 53 is pressed against the partition plate 20 by the elastic force (spring force) of the claw 25. In the above-described claw fixing, the locking hole 65 is provided in the left side wall 53 and the claw 25 is provided in the partition plate 20, but the claw is provided in the frame 50 and the locking hole is provided in the partition plate 20. It may be. As described above, the electrical component unit 90 is attached to at least the partition plate 20.

  Since only the claw fixing by the claw elastic force (spring force) cannot particularly suppress the movement in the direction in which the claw is inserted, the bolt unit is added to attach the electrical unit 90 to the upper part of the machine room M more. Be strong. In the outdoor unit 100, a predetermined distance in the vertical direction is separated from a rear panel flange formed by bending the flange 54 of the right side wall 52 of the frame on the inner side (machine room M side) at the front side end of the rear panel 8. This can be achieved by fastening with two bolts.

  Since the frame right side wall 52 and the rear panel 8 are bolted by overlapping the flanges bent in the left and right direction so as to overlap each other at the front edge thereof, the frame right side wall 52 behind the overlapped flanges is fixed. And a right side wall of the rear panel 8 is formed with a space M1 having a predetermined lateral width (see FIG. 4). The space M1 is a part of the machine room M, and the ventilation hole 55 of the frame right side wall 52 of the electrical component unit 90 is opened facing the space M1 part of the machine room M. The wiring passage notch 64 also faces the space M1.

  In the mounting operation of the electric product unit 90, for example, even if the engagement with the locking hole of the claw is insufficient and the electric product unit 90 is about to fall, the hook 71 is connected to the upper flange of the upper end of the partition plate 20. Since the electric component unit 90 is suspended by the hook 23, the fall can be prevented.

  When the mounting of the electrical component unit 90 is completed, connection of electrical wirings to the electrical component unit 90 is performed. A wiring clip 91 is used for handling the electrical wiring in the electrical component unit 90. When the mounting of the electrical unit 90 and the routing and connection of the electrical wiring are completed, the right front panel 7 can be mounted. It should be noted that the electrical component unit after completion of the mounting in the upper part of the machine room M is not performed by the electrical component unit 90 prior to mounting in the machine room M as described above, without fixing the reactor 40 to the reactor mounting member 70. 90 may be performed.

  FIG. 17 is a perspective view of the upper portion of the partition plate 20 as viewed from above the fan chamber F side (front side) with the electrical unit 90 and the right front panel 7 attached. As shown in FIG. 17, the ventilation hole 58 of the left side wall 53 faces the communication hole 24 of the partition plate 20. The communication hole 24 is larger than the ventilation hole 58 in both the vertical direction and the front-rear direction, and the entire ventilation hole 58 is accommodated in the area of the communication hole 24. In this state, the vent hole 58 communicates with the fan chamber F through the communication hole 24. As described above, the communication hole 24 of the partition plate 20 is a substantially rectangular through hole having a size such that the entire region of the vent hole 58 of the left side wall 53 of the frame is accommodated in the region.

  The surface of the partition plate 20 on the side of the fan chamber F is fitted with a second cover 15 that is partitioned by a wall surface on the upper and lower sides and the front side so as to cover the first cover 26 and that only the rear side is open. The 18 is a perspective view of the partition plate 20 with the second cover 15 attached as viewed from the fan chamber F side (front side) as in FIG. 17, and FIG. 19 is a direction different from FIG. It is the perspective view seen from the back side.

  Unlike the first cover 26, the second cover 15 is manufactured separately from the partition plate 20, and is fixed to the partition plate 20 by, for example, claw fixing. The second cover 15 is longer than the first cover 26 in the vertical direction, and is large enough to cover at least half or more from the front side of the first cover 26 in the front-rear direction. The second cover 15 has a water immersion prevention wall 16 facing the front opening 27 at a predetermined distance in front of the front opening 27 of the first cover 26, and the water immersion prevention wall 16 has three wall surfaces. The front side of the second cover 15 is closed. In addition, the bottom wall 17 is one of the three wall surfaces at a predetermined distance from the lower end of the first cover 26, and the lower side of the second cover 26 is closed.

  The second cover 15 covers the first cover 26 from the left side at a predetermined distance in the left-right direction, that is, at a predetermined distance from the first cover 26. The entire back surface side of the second cover 15 is opened by a back surface opening 18. The opening direction of the front opening 27 of the first cover 26 and the rear opening 18 of the second cover 15 are shifted from each other by 180 degrees. In other words, the rear opening 18 of the second cover 15 opens in the direction opposite to the front opening 27 of the first cover 26. Further, the flood prevention wall 16 is a wall surface that closes the opposite side of the back opening 18 of the second cover 15.

  FIG. 20 is a cross-sectional view around the electrical unit 90 of the outdoor unit 100 (a cross-sectional view of the main part in FIG. 4). As shown in FIG. 20, the space 11 (formed by the bulging portion 72 of the reactor mounting member 70) having the inlet 12 that opens in the electrical component unit 90 includes the vent hole 58, the communication hole 24, and the first cover 26. The fan chamber F communicates with the front opening 27 and the rear opening 18 that opens 180 degrees on the opposite side. Thereby, an air flow path between the electrical unit 90 and the fan chamber F is secured. In addition, the region of the communication hole 24 may protrude so as to protrude toward the partition plate 20 so as to face the ventilation hole 58 from the communication hole 24, and the convex region may be accommodated in the communication hole 24. . That is, the vent hole 58 and the communication hole 24 are set at substantially the same position in the left-right direction.

  In addition, the 2nd cover 15 may be previously fixed to the partition plate 20 before installing in the baseplate 1 by spot welding etc., for example. In this case, the state as shown in FIG. 17 does not occur during the assembly of the outdoor unit 100, and FIG. 17 shows a virtual state where the second cover 15 fixed in advance is removed. Subsequently, the left front panel 6 (including the blowout grill 6b) is attached, and then the top panel 5 is put on and bolted to the upper edge of the panel constituting the other box body excluding the bottom plate 1.

  When the outdoor unit 100 is installed on site (installation location), the power line and signal line from the indoor unit connected to the terminal block 85 are connected to the lower part of the machine room M (finally the position is on the right side). If the right front panel 7 once removed from the front of the compressor 4 is installed in the machine room M together with the connection pipe from the pipe connection port provided at the lower part of the front panel 7, Between the right front panel 7 and the compressor 4). Then, it passes through the recess 62 at the front end of the frame bottom portion 51, reaches the terminal block 85, and is fixedly connected to the terminal block 85. That is, the power supply line and the signal line from the indoor unit rise from the lower side of the terminal block 85 toward the terminal block 85, pass through the recess 62, and are connected to the terminal block 85.

  As shown in FIG. 20, the entrance 12 of the space 11 of the reactor mounting member 70 does not overlap the electrical board 30 in the front-rear direction, and is located on the left side of the left end of the vertical electrical board 30 in the front-rear direction. It opens toward the back side at a position in the middle of the electrical board 30. That is, the inlet 12, which is an opening facing the back side of the space 11 of the reactor mounting member 70, is positioned closer to the partition plate 20 in the left-right direction than one end on the partition plate side of the electrical substrate 30, in other words, the electrical substrate 30. Between the one end on the partition plate side and the partition plate 20 and in the front-rear direction, a position that is in the middle of the electrical board 30, in other words, a position that overlaps the electrical board 30 in the left-right direction, and the space 11 is at that position It opens to the back side. Further, the inlet 12 is located in the middle of the electrical board 30 in the vertical direction (see FIG. 5). The reactor 40 attached to the attachment surface 73 of the reactor attachment member 70 is positioned in front of the left side portion of the electrical board 30.

  FIG. 21 is a perspective view of the top panel 5 as seen from the back side, that is, from the inside of the indoor unit 100. As shown in FIG. 21, the portion located above the machine room M on the back of the top panel 5 (the side facing the inside of the outdoor unit 100) is made of an elastic member made of foamed resin so as to correspond to the four sides of the quadrangle. A seal 14 is affixed. Here, in order to improve the yield of the seal 14, four linear seals are individually attached, but these may be integrally formed.

  The four-sided wall 5a formed by being bent downward at the edges of the four-sided circumference of the top panel 5 is recessed into the inside of each of the left front panel 6, the right front panel 7, the rear panel 8, and the left side panel 9, and the tip ( When the top panel is fitted to the top edge folded back inward (with the four-sided wall 5b positioned outside) and secured with bolts, that is, when the top panel 5 is properly mounted, it is attached to the back side. The attached elastically deformable four-sided seals 14 are the upper surfaces of the right front panel 7 and the rear panel 8, the upper surface of the partition plate 20 (including the upper surface of the hook 71 of the reactor mounting member 70), and the upper surface of the frame roof 60. A gap in the vertical direction with the top panel 5 is filled in contact with the upper surface of the right side wall 52 of the frame.

  Here, the upper end surfaces of the right front panel 7 and the rear panel 8 are bent toward the machine room M side to have a predetermined width, and the seal 14 contacts the surface of the predetermined width. In the partition plate 20, the seal 14 comes into contact with the upper flange 23 that is bent toward the fan chamber F side. These include the contact between the seal 14 and the roof portion 60, and the contact between the seal 14 and the upper surface of the frame right side wall 52. The gap above the electrical component unit 90 is covered by the seal 14 of the top panel 5 in all four directions. Therefore, the inflow of air from above the machine room M into the electrical unit 90 and the outflow of air in the opposite direction are prevented.

  The elastic member 61 attached to the front end and the right end of the frame bottom portion 51 is in contact with the back surface of the right front panel 7 and the partition plate 20. In addition, an elastic member (not shown) having a thickness and length substantially equal to the depth and length of the recess 62 is attached to the recess 62 at a position facing the recess 62 on the back of the right front panel 7. The elastic member acts to fill the recess 62. That is, the power supply line and the signal line passing through the recess 62 are sandwiched while the elastic member is elastically deformed from the front and rear. For this reason, the inflow of air from below the machine room M into the electrical component unit 90 and the outflow of air in the opposite direction are also prevented.

  The left side wall 53 of the frame is pressed against the partition plate 20 by the elastic force (spring force) of the claw 25 by fixing the claw, and the flange 54 at the front end of the right side wall 52 of the frame is bent to the inside of the rear panel 8. The two flanges are fastened with two upper and lower bolts and are in pressure contact with each other. Therefore, the flow of air flowing from the machine room M through the left side of the frame left side wall 53 to the front and flowing into the electrical unit 90 and in the opposite direction, and via the right side of the frame right side wall 52 As a result, there is no flow of air flowing in the forward direction and flowing into the electrical component unit 90 in the opposite direction.

  As described above, the electrical unit 90 that is located in the upper part of the machine room M and prevents the inflow / outflow of air from the up / down direction and the inflow / outflow of air from the left / right direction to the machine room M includes a frame. The interior communicates with the machine room M through a ventilation hole 55 provided in the right side wall 25. That is, by passing through the ventilation hole 55, the air in the machine room M and the electrical component unit 90 can flow in and out.

  As described above, the electrical component unit 90 of the outdoor unit 100 communicates with the machine room M (space M1) through the ventilation hole 55, and an air flow path between the two is ensured. In other words, only the ventilation hole 55 located on the right side of the electrical board 30 enables air to flow with the machine room M of the electrical component unit 90.

  The ventilation hole 55 of the right side wall 52 of the frame enabling the flow between the machine room M and the electrical component unit 90 is at a position on the right side of the right end of the vertically mounted electrical board 30 and in the middle of the electrical board 30 in the front-rear direction. The two are in communication with each other. That is, on the wall surface (here, the frame right side wall 52) located on the opposite side to the partition plate side of the outer frame of the electrical component unit 90, in the left and right direction than the other end on the side opposite to the partition plate of the electrical board 30. The position away from the partition plate 20, in other words, the other end on the side opposite to the partition plate of the electrical board 30 and the side wall of the box of the indoor unit 100 (here, the side wall of the rear panel 8 or the side wall of the right front panel 7). Between the electrical component unit 90 and the machine room M at a position that is in the middle of the electrical board 30 in the front-rear direction, in other words, at a position that overlaps the electrical board 30 in the left-right direction (here, Ventilation holes 55) are provided. However, a space M1 that is a part of the machine room M exists between the ventilation hole 55 and the side wall of the box (here, the side wall of the rear panel 8 or the side wall of the right front panel 7).

  In this outdoor unit 100, the protective cover 13 fitted into the wiring passage notch 64 on the right side wall 52 of the frame is formed of, for example, a highly stretchable foamed resin so as to enclose the passing electric wiring, The gap with the electrical wiring passing through is not generated. If there is a gap between the protective cover 13 and the electrical wiring, air can also flow between the machine room M and the electrical unit 90 through the gap. However, even in this case, the gap is formed in the right side wall 52 like the ventilation hole 55, is included in the range of the ventilation hole 55, and can be regarded as a part of the ventilation hole 55.

  Here, the cooling effect | action of the reactor 40 and the electrical equipment board | substrate 30 in the electrical equipment unit 90 of this outdoor unit 100 which has the above structures is demonstrated. When the outdoor unit 100 is in an operating state based on an operation command signal from the indoor unit, the operation of the compressor 4 (suction and compression of refrigerant in the refrigeration cycle is started and discharged) and the blower fan 3 is rotated in a normal rotation direction ( Rotate in the forward direction). When the blower fan 3, which is a propeller fan, rotates in the forward direction (forward rotation), the flow of air that is sucked from the rear and side surfaces of the blower fan 3 and blown out from the front outlet (blowing grill 6 b) ( Airflow).

  In the suction process in the air flow described above, outdoor air passes through the heat exchanger 2, where heat is exchanged with the refrigerant flowing through the piping of the heat exchanger 2, and the refrigerant evaporates (heating operation) or condenses. (Cooling operation). The suction action of the blower fan 3 also acts on the electrical unit 90 that is in communication with the fan chamber F (air flow path is formed) through the vent hole 58 and the like of the left side wall 53 of the frame. The air inside is sucked into the blower fan 3 through the fan chamber F and the air flow path of the electrical component unit 90.

  The air in the machine room M flows into the electrical component unit 90 from the ventilation hole 55 communicating with the machine room M so as to supplement the air sucked into the fan room F. Further, the machine room M communicates with the outside by a suction grill 8a below the rear panel 8, and outdoor air flows into the machine room M through the suction grill 8a so as to supplement the air flowing into the electrical unit 90. .

  In this manner, when the blower fan 3 rotates normally (forward rotation), the suction fan 8 that is rotating flows into the suction grille 8a and moves up the machine room M (as the last of the machine room M). Passes through the space M1), and an air flow (cooling air flow) that crosses the electrical component unit 90 in the left-right direction and flows out into the fan chamber F is generated. FIG. 22 is an explanatory diagram illustrating this air flow with arrows, and an arrow indicating the air flow is added to FIG. This air flow starts when air from the outside is introduced through the suction grill 8 a of the rear panel 8. The air that has flowed into the fan chamber F from the rear opening 18 of the second cover 15 is sucked into the blower fan 3, passes through the heat exchanger 2, and heat-exchanged with the air from the outlet of the left front panel 6. It is blown out.

  In the air flow (cooling air flow) indicated by arrows in FIG. 22, the ventilation hole 55 serving as an inlet from the machine room M into the electrical component unit 90 is on the right side of the electrical board 30 in the front-rear direction. 30, and the inlet 12 of the reactor mounting member 70 that opens toward the back side and serves as the inlet of the outflow path from the electrical unit 90 to the fan chamber F is on the left side of the electrical board 30. Since it is located in the middle of the electrical board 30 in the front-rear direction, it passes through the electrical board 30 so as to cross the left-right direction.

  Therefore, this air flow passes through the electrical board 30 so as to cross in the left-right direction, and is discharged from the electrical and electronic components (for example, the smoothing capacitor 33) of the electrical board 30 that generates heat during operation. The heat that is generated is dissipated and the electric and electronic parts that generate heat are cooled.

  The air flow (cooling air flow) that has cooled the electric and electronic components that generate heat passes through the electrical board 30 and then continues to be sucked by the blower fan 3, so that the electrical product unit 90 in the communication path between the electrical product unit 90 and the fan chamber F is obtained. It flows into the space 11 from the inlet 12 of the reactor mounting member 70 serving as an opening on the side, passes through the space 11, passes through the vent hole 58 and the communication hole 24, and flows into the fan chamber F side. Here, since the reactor 40 is pressed against the reactor mounting surface 73 of the reactor mounting member 70, heat released from the reactor 40 that is generating heat in the operating state is transmitted to the bulging portion 72 via the reactor mounting surface 73. Yes.

  In the process in which the cooling air flow that crosses the electrical unit 90 in the left-right direction and travels toward the fan chamber F passes through the space 11 of the reactor mounting member 70, heat is radiated from the bulging portion 72 to which heat is transferred from the reactor 40. By doing so, the reactor 40 can be cooled. That is, the heat generated from the reactor 40 can be dissipated by the cooling air flow. Cooling of the reactor 40 can be achieved by providing a large number of fins substantially parallel to the flow direction of the air passing through the inner surface of the bulging portion 72 and increasing the contact area between the passing air flow and the inner surface of the bulging portion 72. The effect is further enhanced.

  Thus, the cooling air flow cools the electrical board 30 and the reactor 40 in order in the process of crossing the electrical unit 90 in the left-right direction and flowing into the fan chamber F side. And the flow of the air guide | induced to the fan chamber F by the attraction | suction effect | action by the rotation (forward rotation) of the blowing fan 3 from the machine room M which leads to the outdoors is only this cooling air flow.

  The air flow passing through the space 11 and passing through the ventilation hole 58 of the left side wall 53 of the frame and the communication hole 24 of the partition plate 20 exits the front opening 27 of the first cover 26 and faces the front opening 27. 15 is bent so that the flow direction is folded back by the inundation prevention wall 16, flows out from the rear opening 18 opening in the direction opposite to the front opening 27 to the fan chamber F, and is sucked into the blower fan 3.

  As described above, an air flow that is guided to the fan chamber F from the machine room M communicating with the outside (external) through the electrical unit 90 by the suction action generated by the rotation of the blower fan 3 in the forward rotation direction. Since the paths are set so as not to be dispersed or divided into a plurality of paths, a plurality of flow paths (for example, air flows into the electrical unit 90 from the machine room M from multiple directions). In this case, the amount of air (flow rate) passing through the air flow path is large and the flow is stable.

  Since most of the cooling air flow having a large flow rate flowing through the air flow channel flows across the electrical board 30, the effect of cooling the electrical board 30 is high. And since the whole quantity of the air flow passes through the space 11 and radiates the bulging part 72 after cooling the electrical substrate 30, the effect of cooling the reactor 40 is also high. In particular, the air flow that cools the electrical board 30 and the air flow that cools the reactor 40 are not separated separately, and the air flow that flows through the series of air flow paths cools each in turn, thereby cooling the air flow. Sufficient air flow is obtained and the cooling effect is enhanced. Therefore, the electrical substrate 30 and the reactor 40 can be sufficiently cooled, and their efficient operation can be ensured.

  On the other hand, when the outdoor unit 100 is in the operation stop state, the blower fan 3 is not energized by the fan motor 3a, so that the spontaneous rotation by driving the fan motor 3a is stopped. However, since the rotation of the blower fan 3 is not locked at the time of stoppage, if the blades of the blower fan 3 that is a propeller fan receive natural wind, the blower fan 3 will not be energized even if the fan motor 3a is not energized. Rotate.

  Here, when the wind that hits the blower fan 3 is a wind that travels from the front to the back of the blower fan 3, the direction of the wind that passes through the blower fan 3 is rotating forward during operation. Since the direction of the air flow passing through the blower fan 3 is opposite, the blower fan 3 rotates in the opposite direction to the rotation direction (forward rotation direction) during operation. In this way, when the outdoor unit 100 is stopped, the blower fan 3 may rotate in reverse due to the natural wind (outdoor). And the stronger the wind, the higher the rotational speed of the blower fan 3 that rotates in the reverse direction.

  If the blower fan 3 rotates in the reverse direction, an air flow opposite to that in the normal rotation occurs. For this reason, at the time of reverse rotation, an air flow that flows from the rear opening 18 of the second cover 15, traverses the electric unit 90 from the fan chamber F, and reaches the machine chamber M through the ventilation holes 55 is also generated. That is, an air flow that flows in the opposite direction to the cooling air flow that cools the electrical board 30 and the reactor 40 in order generated by the suction action of the blower fan 3 during forward rotation is generated when the blower fan 3 rotates in the reverse direction. is there.

  The blower fan 3 reversely rotates by the natural wind blown into the fan chamber F from the front outlet (blowout grill 6b), and the air flow in the opposite direction passing from the fan chamber F to the machine chamber M passes through the electrical unit 90. However, there is no problem as long as only air passes through the electrical unit 90. However, for example, rain that has been raining so far and rainwater that has entered the fan chamber F from the blow-out grill 6b adheres to the blower fan 3, and the attached moisture is subjected to centrifugal force due to reverse rotation of the blower fan 3 by wind. It can happen that the air is scattered and transported on the air flow generated by reverse rotation.

  Further, for example, when it is raining with the wind outdoors, when wind that reversely rotates the blower fan 3 enters from the blowout grill 6b, rainwater also enters the fan chamber F together with the wind, and the rainwater that has entered is left as it is. It can also be carried on the airflow generated by the reverse rotation of the blower fan 3. In this way, there is a concern that the airflow generated by the reverse rotation of the blower fan 3 by natural wind carries moisture such as rainwater on the airflow.

  If rainwater gets into the electrical component unit 90 by riding on the airflow generated during the reverse rotation of the blower fan 3, there is a possibility that the rainwater may adhere to the electrical board 30 that the airflow crosses. There is a possibility that the electrical board 30 is short-circuited. Therefore, it is necessary to prevent rainwater from entering the electrical component unit 90 by the air flow caused by the reverse rotation.

  As described above, since the upper part of the electrical unit 90 is sealed by the seal 14 of the top panel 5, rainwater does not enter the electrical unit 90 from the top panel 5 side. In addition, the cooling air flow that flows due to the suction action when the blower fan 3 rotates in the forward rotation direction when the outdoor unit 100 is operating starts from the outside through the suction grill 8a formed in the lower part of the rear panel 8 to the machine room. Even if it is raining at this time, the suction grill 8a is opened only downward on the outward surface of the rear panel 8 due to the presence of the cover body by louvering as described above. Rainwater is difficult to enter from the grill 8a.

  Further, for example, even if the momentum of rain is very strong and rainwater bounces off the ground and enters the machine room M from the suction grille 8a, the cooling air flow generated during the forward rotation of the blower fan 3 is the upper part of the machine room M. Since the inside of the machine room M rises to the ventilation hole 55 of the electrical component unit 90 located at, the rainwater is separated from the air flow by gravity and falls in the ascending process. For this reason, rainwater that has jumped up and entered the machine room M does not enter the electrical unit 90 through the ventilation hole 55.

  When the wind from the front that rotates the blower fan 3 is weak, that is, when the wind speed is low, the rotation speed of the blower fan 3 that rotates in reverse is low, so moisture (rain water) adhering to the blower fan 3 is scattered. Even if rainwater is mixed with the airflow generated by reverse rotation, the flow velocity of the airflow is small, and the mixed rainwater falls in the fan chamber F by gravity and is separated from the airflow. The possibility of rainwater entering 90 is low. However, in the case of a strong wind, the rotational speed of the blower fan 3 is high and the flow rate of the airflow generated by the reverse rotation is large, so that the airflow may carry rainwater into the electrical unit 90. It is necessary to prevent rainwater from entering the electrical unit 90 by the air flow.

  In the outdoor unit 100, in order to prevent such intrusion of rainwater, the opening direction of the first cover 26 and the second cover 15 on the surface of the partition plate 20 on the fan chamber F side is 180 in the front-rear direction. A double-structured cover is provided so that it is the opposite. The second cover 15 covers the first cover 26, and the lower end (bottom plate 17) of the second cover 15 is located below the lower end of the first cover 15 with a predetermined distance (see FIG. 19). .

  FIG. 23 is an explanatory diagram illustrating the flow of air generated by reverse rotation of the blower fan 3 and flowing from the fan chamber F through the electrical unit 90 to the machine chamber M with arrows. When the air flow generated by the reverse rotation of the blower fan 3 contains moisture such as rainwater, it flows into the second cover 15 from the rear opening of the second cover 15 and the inner surface of the second cover 15 and the first cover 26. The space formed by linearly extending in the front-rear direction between the outer surface and the outer surface of the second cover 15 flows toward the infiltration prevention wall 16, which is a wall surface closing the front side of the second cover 15, that is, toward the front side. Here, this space is referred to as a DC path K, and this DC path K is provided between the inner surface of the second cover 15 above and below the first cover 15 and the surface of the partition plate 20 on the fan chamber F side. The space to be formed is also included.

  The flow rate of this air flow is narrowed by the DC path K, so that the air flow rate is increased compared to when the air flow is proceeding in the fan chamber F before the rear opening 18. Since rainwater being carried on an air stream has a corresponding weight, an inertial force in the flow direction acts. Therefore, even if the air flow passes through the front end of the first cover 26, that is, passes through the DC path K and is bent so as to return the flow direction toward the front opening 27 of the first cover 26, it is included in the air flow. The rainwater that is present advances to the front side as it is and collides with the inner surface of the inundation prevention wall 16.

  The rainwater collides with the infiltration prevention wall 16, so that the flow velocity becomes zero, and the rainwater separates from the air flow about to flow into the front opening 27 of the first cover 26 and adheres to the inner surface of the infiltration prevention wall 16. As described above, rainwater collides with the inundation prevention wall 16 by passing through the DC path K, so that the rainwater carried on the airflow is air upstream from the first cover 26, that is, in the fan chamber F. Can be separated from the stream. Since the air flow from which moisture (rain water) has been removed flows from the front opening 27 of the first cover 26, the air flow enters the electrical unit 90 as it is and crosses it toward the machine room M. Even if it flows to the electrical component unit 90, water such as rainwater does not enter the electrical component unit 90.

  The cooling air flow of the electrical unit 90 that flows into the fan chamber F from the machine room M through the electrical unit 90 generated by the suction action during the forward rotation of the blower fan 3 flows through a series of air flow paths. In the same manner, an air flow that flows in the reverse direction due to the reverse rotation of the blower fan 3 also flows through a series of air flow paths. It is possible to reliably prevent water from entering into the electrical component unit 90 by simply separating the electrical component.

  Moisture that is separated from the air flow and adheres to the flooding prevention wall 16 of the second cover 15 falls along the wall surface by gravity and reaches the bottom wall 17. When water is collected on the bottom wall 17, it gravity falls from the rear opening 18 along the lower edge to the bottom plate 1 which is the bottom surface of the fan chamber F. Since the bottom plate 1 also serves as a drain pan, the moisture dropped on the bottom plate 1 flows out of the outdoor unit 100 through the drain path together with other moisture on the bottom plate 1.

  Moisture separated from the airflow on the bottom wall 17 enters the front opening 27 because the bottom wall 17 is located at a predetermined distance from the lower end of the front opening 27 of the first cover 26 in the vertical direction. There is no end. If the bottom wall 17 is tilted so that the back opening 18 side is located below the infiltration prevention wall 16 side, moisture (rain water, etc.) separated from the air flow is dropped from the second cover 15 to the bottom plate 1 more quickly ( Can be drained).

  Although it is possible to expedite drainage from the second cover 15 by providing a drain hole in the bottom wall 17, there is a possibility that an air flow generated by the reverse rotation of the blower fan 3 also flows from the drain hole, and separation occurs. It is desirable to drain the water from the lower edge of the back surface opening 18 because the generated moisture may be blown up by the air flow from the drain hole.

  Further, in the outdoor unit 100, a double-structured cover for preventing the moisture conveyed by the air flow generated by the reverse rotation of the blower fan 3 from entering the electrical unit 90 from the fan chamber F is located on the inner side. The opening (front opening 27) of the cover (first cover 26) that faces the front side and the opening (rear opening 18) of the cover (second cover 15) located on the outside faces the back side. If the opening position is such that the suction action of the blower fan 3 reaches the electrical component unit 90 and the machine room M through the opening of the cover located outside during the forward rotation of 3, the opening direction of each cover is reversed. There may be.

  As described above, in the outdoor unit 100, when the blower fan 3 rotates in the normal direction, i.e., the normal rotation during the operation of the outdoor unit 100, the fan chamber F is connected to the outside (external) by the suction action. A cooling air flow can be secured. This cooling air flow flows through a series of air flow paths, and traverses the electrical unit 90 having the electrical substrate 30 and the reactor 40 in the left-right direction on the way from the machine room M to the fan room F. From the position of the inlet (ventilation hole 55) of the air flow to the electrical component unit 90 and the entrance (inlet 12) of the outflow path, the cooling air flow crosses the electrical board 30 when traversing the electrical component unit 90. Then, the electrical board 30 is cooled (air cooled).

  The total amount of the air flow that has cooled the electrical board 30 dissipates the heat generated from the reactor 40 while passing through the outflow path from the electrical component unit 90 to the fan chamber F. In this way, the cooling airflow flowing through the series of air flow paths sequentially cools the electrical board 30 and the reactor 40, so that an air flow rate sufficient for cooling is secured, and the heat generated by the electrical board 30 and the reactor 40. Is efficiently dissipated to the fan chamber F, so that both can be cooled firmly and the efficient operation of both can be maintained. Since the cooling effect is high, a larger amount of current can be supplied, and the outdoor unit 100 can be operated more powerfully.

  Further, the passage (communication hole 24) between the electrical unit 90 and the fan chamber F is covered with a double cover whose opening direction is 180 degrees opposite in the front-rear direction on the fan chamber F side. Even if the airflow flowing in the opposite direction to the forward cooling airflow generated by the reverse rotation of the blower fan 3 by natural wind contains moisture such as rainwater, the cover located on the outside (second cover 15) Since the water collides with the wall surface (infiltration prevention wall 16) that bends the traveling direction of the air flow and the water flow velocity is zero and adheres to the wall surface, the water is removed from the air flow, and the machine room M is submerged. Can be prevented.

  For this reason, for example, even when it is raining, even if the blower fan 3 rotates backward due to natural wind and an air flow flowing from the fan chamber F to the machine chamber M is generated, the electricity disposed in the upper part of the machine chamber M is The electronic control components (the electrical board 30 and the reactor 40 included in the electrical unit 90) do not get wet with water such as rain water, and the reliability of these components can be maintained.

  A reactor mounting surface 73 of the reactor mounting member 70 is provided at the top of the bulging portion 72 that bulges so that a box-shaped space is formed inside, and the machine room M and the space inside the bulging portion 72 are provided. Since the passage to the fan chamber F (the ventilation hole 58 of the left side wall 53 of the frame and the communication hole 24 of the partition plate 20) is located, the air flow generated by the suction action during the forward rotation of the blower fan 3 is It passes through the space 11 on the back side and flows into the fan chamber F. For this reason, the bulging portion 72 to which heat is transmitted from the reactor 40 can be sufficiently dissipated from the inside, so that the cooling effect of the reactor 40 is high.

  In addition, the inlet (the ventilation hole 55 of the right side wall 52 of the frame) through which the air flow generated by the suction action during the forward rotation of the blower fan 3 flows into the electrical component unit 90 is made up and down in correspondence with the vertical electrical board 30. It is elongated in the direction and is opened at a position on the right side of the right end of the electrical board 30 and at a position in the middle of the electrical board 30 in the front-rear direction, in other words, at a position overlapping the electrical board 30 in the left-right direction. .

  Then, the inlet 12 of the space 11 of the reactor mounting member 70 serving as an inlet of the path through which the air flow flows out from the electrical component unit 90 is positioned in the middle of the vertical electrical board 30 in the vertical direction, and the electrical board At the position on the left side of the left end of 30, the opening is made toward the back side at a position in the middle of the electrical board 30 in the front-rear direction, in other words, at a position overlapping the electrical board 30 in the left-right direction. Therefore, when the air flow generated by the suction action at the time of forward rotation of the blower fan 3 passes through the electrical component unit 90, the electrical substrate 30 flows from the right end to the left end, and the electrical substrate 30 can be cooled in a wide range. Therefore, the cooling effect of the electrical board 30 is high.

  Further, the reactor mounting member 70 is fixed to the inward surface, which is one surface of the left side wall 53 of the frame 50 constituting the outer frame of the electrical unit 90, by spot welding, and the outward side surface of the left side wall 53 on the opposite side is partitioned. Since the plate 20 is brought into pressure contact with the elastic force of the claw fixed to the claw, at least in the range of the fixing portion 75 of the reactor attachment member 70, the three metal plates of the attachment member 70, the frame left side wall 53, and the partition plate 20 are in close contact. It has a triple structure.

  For this reason, even if the communication hole 24 of the partition plate 20 is formed with one hole having a wide opening area so that the ventilation hole 58 formed of a large number of through holes in the left side wall 53 is within the opening range, the triple structure With the combination, the rigidity of the overlapping portion is increased, and the rigidity of the partition plate 20 that is liable to decrease in rigidity due to the formation of the communication hole 24 can be maintained high without increasing the thickness. Even if the reactor 40 which is a thing is attached and fixed to the reactor attachment member 70, the partition plate 20 does not bend.

  By maintaining the rigidity of the partition plate 20 by the triple structure, the communication hole 24 of the partition plate 20 does not need to be configured by combining a large number of through holes having a small area such as the ventilation hole 55 and the ventilation hole 58. If the communication hole 24 is composed of a combination of a large number of through holes having a small area in the same manner as the vent hole 58 in order to ensure the rigidity of the partition plate 20, it is positioned in each through hole of the vent hole 58 and the communication hole 24. If the deviation occurs, the communication area between the electrical component unit 90 and the fan chamber F decreases.

  In this indoor unit 100, the partition plate 20, the left side wall 53 of the frame, and at least the fixing portion 75 of the reactor mounting member 70 have a triple structure pressed against each other, and the rigidity of the partition plate 20 is increased. Without increasing the plate thickness of the plate 20, the communication hole 24 can be formed by one hole having a large opening area, and the communication area between the electrical component unit 90 and the fan chamber F can be set to a large number of through holes that constitute the vent hole 55. Thus, a sufficient communication area can be ensured. In addition, bolt fixing at a plurality of positions at further intervals is added to the triple structure of the partition plate 20, the left side wall 53 of the frame, and the fixing portion 75 of the reactor mounting member 70, so that the three members You may improve adhesiveness.

  In addition, since the first cover 15 that covers the communication hole 24 in the area of the fan chamber F is integrally formed with the partition plate 20 by louvering, the rigidity around the communication hole 24 is increased by the integrally formed first cover 26. It is done. Therefore, in addition to the triple structure described above, the first cover 15 integrally formed by louver processing further increases the rigidity of the metal thin partition plate 20 in which one communication hole 24 having a large opening area is opened. can do.

  Further, a box-shaped space 11 is formed on the back side of the reactor mounting surface 73 of the reactor mounting member 70, and the partition plate 20 communicates with the fan chamber F so as to face the space 11 through the vent hole 58 of the left side wall 53 of the frame. The communication hole 24 is opened so that the cooling airflow passes through the space 11 when the blower fan 3 rotates forward, and the heat generated by the reactor 40 is radiated through the reactor mounting member 70 by the passing airflow. Thus, the reactor 40 can be sufficiently cooled without arranging the reactor 40 having a large volume as well as a weight in the course of the cooling air flow. Therefore, the reactor 40 having a large volume can be disposed in front of the vertical electrical board 30 in the electrical unit 90, and the space in the electrical unit 90 can be used efficiently.

  In addition to the fact that the reactor 40 is disposed in front of the electrical board 30, the reactor mounting surface 73 is not parallel to the left side wall 53 of the frame, and the left side wall 53 on the back side rather than the front side. Is inclined to the front side at a predetermined angle (about 20 degrees in this case) so that the distance in the left-right direction is increased (away from). Since the work surface is easy to see, such as easy to confirm the position of 44, the workability of the reactor 40 detachment work is good, and the work reliability is also improved.

  Since the reactor 40 is arranged in front of the electrical board 30 when the electrical board 30 is exchanged in the maintenance work, the removal work of the reactor 40 is also required when the electrical board 30 is detached. As described above, since the workability of the detaching operation of the reactor 40 is good, the presence of the reactor 40 located in front of the electrical substrate 30 does not become an obstacle to the replacement operation in the replacement operation of the electrical substrate 30.

  In this indoor unit 100, the air flow path of the cooling air flow passing through the electrical component unit 90 by the suction action during normal rotation of the blower fan 3 mainly crosses the front side (mounting side) of the electrical board 30. However, the electrical board 30 may be arranged so that the mounting surface faces the back side, and the back side of the electrical board 30 is mainly traversed.

  Further, for example, in the case where a heat sink or other electric and electronic parts are provided on the side opposite to the mounting surface of the electrical board 30 (here, the surface facing the back side of the outdoor unit 100), the ventilation holes in the right side wall 52 of the frame 55 may be arranged so as to straddle the front and rear surfaces of the electrical board 30 so that the cooling air flow flows across the mounting parts on both sides of the electrical board 30 to cool the mounting parts on both sides. .

  In addition to the cooling air flow path that passes through the mounting surface side of the electrical board 30, an air flow path that cools mounting components such as a heat sink on the non-mounting surface side is set so that the cooling air flow that passes through the electrical unit 90 Can be configured by separate air flow paths that are separated on both the front and rear surfaces of the electrical board 30. In such a case, in order to cool the cooling air flow passing across the front side of the electrical board 30 (the mounting surface side in the outdoor unit 100) and components attached to the back side of the electrical board 30 such as a heat sink, for example. One or both of the cooling airflows flowing on the rear side are joined to each other and then flowed into the space 11 to cool the reactor 40 and dissipate the heat generated by the electrical board 30 and the reactor 40 into the fan chamber F. Let

  In this way, a series of airflows that flow to cool the reactor 40 after cooling the electrical board 30 without dispersing the cooling airflow of the electrical board 30 and the cooling airflow of the reactor 40 in separate flow paths. By setting the path, a sufficient air flow rate for cooling can be secured, and the heat generated by the electrical board 30 and the reactor 40 can be efficiently dissipated into the fan chamber F. Therefore, both can be cooled firmly and efficient operation can be ensured.

  In addition, when the cooling air flow passing through the back side of the electrical board 30 is caused to flow into the fan chamber F through an air flow path different from the air flow passing through the front side, an opening serving as an exit of the path A double-structure cover body similar to the double-structure cover that covers the communication hole 24 is provided on the fan chamber F side, and moisture such as rainwater is generated by the air flow that reversely flows through the flow path generated by the reverse rotation of the blower fan 3. Needless to say, it is necessary to prevent intrusion into the electrical unit 90.

  As described above, the outdoor unit 100 secures a series of cooling air passages that cool the electrical substrate 30 and the reactor 40 in this order, and sufficiently cools them to maintain efficient operation. The air flow generated by the reverse rotation of the blower fan 3 due to the natural wind prevents the moisture such as rainwater from entering the machine room M from the fan room F through the cooling air flow path. 30 and the reactor 40 can be made a highly reliable outdoor unit in which moisture does not adhere.

  1 bottom plate, 2 heat exchanger, 3 blower fan, 4 compressor, 5 top panel, 6 left front panel, 7 right front panel, 8 rear panel, 8a suction grille, 9 left side panel, 10 struts, 11 space, 12 Inlet, 13 Protective cover, 14 Seal, 15 Second cover, 16 Inundation prevention wall, 17 Bottom wall, 18 Back opening, 20 Partition plate, 21 Central partition, 22 Back partition, 23 Upper flange, 24 Communication hole, 25 claw, 26 first cover, 27 front opening, 30 electrical board, 31 board cover, 32 board holder, 33 smoothing capacitor, 40 reactor, 41 core, 42 coil, 43 base plate, 44 bolt, 50 frame, 51 bottom part , 52 Right side wall (second side wall), 53 Left side wall (first side wall), 54 Flange, 55 Ventilation hole, 56 Inclined surface, 57 Terminal block installation surface, 58 vent hole, 59 back surface portion (support portion), 60 roof portion, 61 elastic member, 62 recess, 63 positioning protrusion, 64 wiring passage notch, 65 locking hole, 70 reactor mounting member, 71 Hook, 72 bulge part, 73 reactor mounting surface, 74 standing wall, 74a root, 75 fixing part, 76 rib, 77 rib, 78 upper claw, 79 lower claw, 80 screw hole, 81 protrusion, 82 mark, 83 positioning hole , 85 terminal block, 90 electrical unit, 100 outdoor unit, F fan room, K DC path, M machine room.

Claims (6)

The outer box,
A partition plate that divides the inside of the box in a left-right direction into a machine room in which a compressor is arranged and a fan room in which a heat exchanger and a blower fan are arranged,
An outdoor unit of an air conditioner, which is attached to at least the partition plate at an upper part of the machine room, and includes an electrical component board, a reactor, and an electrical component unit that supports these and forms an outer frame. ,
The frame is
A first side wall in contact with the machine room side surface of the partition plate and having a vent hole;
A second side wall which is located on the side of the opposite partition plate spaced a predetermined distance in the left-right direction from the first side wall and in which ventilation holes are formed;
A support portion for supporting the electrical board between the first side wall and the second side wall;
A reactor mounting member that supports the reactor is fixed to the inward surface of the first side wall,
This reactor mounting member is
In the middle of the up-and-down direction, a bulging portion that has an upright wall in three directions of the upper side, the lower side, and the front side and includes the rear side end portion and projects inward of the frame,
A reactor mounting surface that is formed in a flat shape on the top of the bulging portion and to which the reactor is mounted;
A fixed portion that is connected to the base of the upright wall and is formed in a planar shape across the upper, lower, and front sides of the bulging portion, and is in contact with the inward surface of the first side wall;
The bulging portion and the first side wall form a box-shaped space that opens toward the back side while the vent hole of the first side wall communicates with the first side wall,
The partition plate is
A communication hole facing the ventilation hole of the first side wall;
A first cover that is provided on the fan chamber side surface, projects inward of the fan chamber to cover the communication hole, and opens toward either the front side or the back side;
A second cover that is provided on the surface of the fan chamber so as to cover the first cover with a predetermined distance in the left-right direction from the first cover, and that opens in a direction opposite to the opening of the first cover. When,
A flood prevention wall provided on the second cover, facing the opening of the first cover with a predetermined distance in the front-rear direction, and closing the opposite side of the opening of the second cover;
The box-shaped space opens between the one end on the partition plate side of the electrical board and the partition plate and faces the back side at a position overlapping the electrical board in the left-right direction,
The ventilation hole of the second side wall is opened between the other end of the electrical board on the side opposite to the partition plate and the side wall of the box and at a position overlapping the electrical board in the left-right direction,
At the time of forward rotation of the blower fan, the blower fan sucks in and passes through the ventilation hole from the machine room into the electrical component unit, and then passes through the electrical board in the left-right direction. Entering the space, passing through the vent hole and the communication hole, an air flow flowing out from the opening of the second cover to the fan chamber is generated,
During the reverse rotation of the blower fan, an air flow generated by the reverse rotation flows into the second cover from the opening of the second cover, and a space formed between the first cover and the second cover. An outdoor unit of an air conditioner that passes through and is bent in a flow direction by a water-preventing wall of the second cover. The vents in the first side wall are configured by arranging a plurality of rows of through-holes arranged in the front-rear direction with a predetermined interval in the vertical direction,
The outdoor unit of an air conditioner according to claim 1, wherein the communication hole of the partition plate is one hole having a size that can accommodate the entire area of the vent hole. 3. The air conditioner according to claim 1, wherein at least the fixed portion of the reactor mounting member, the first side wall of the frame, and the partition plate form a triple structure in close contact with each other. The outdoor unit of the machine. In the electrical unit, the electrical board is supported in a vertically placed state in which the mounting surface on which the electronic component is mounted faces the front side or the back side of the box,
The outdoor unit of an air conditioner according to any one of claims 1 to 3, wherein the reactor attached to a reactor attachment surface of the reactor attachment member is located in front of the electrical board. The reactor mounting surface of the reactor mounting member is inclined to the front side at a predetermined angle so that the distance in the left-right direction from the first side wall of the frame is greater on the back side than on the front side. The outdoor unit of an air conditioner according to any one of claims 1 to 4. The first cover of the partition plate is formed integrally with the partition plate in contact with a peripheral edge of the communication hole excluding the opening of the first cover. An outdoor unit of an air conditioner according to claim 1.

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