JP6717089B2 - Air conditioner outdoor unit - Google Patents

Description

The present invention relates to an outdoor unit for an air conditioner.

Some outdoor units of air conditioners have blowers facing upward. This outdoor unit has a horizontally long rectangular parallelepiped casing, and the inside of the casing is partitioned into a machine room having a heat exchanger and a compressor, and a blower chamber having a blower. The machine room is arranged in the lower part of the housing, the blower room is arranged in the upper part of the machine room, and the air outlet of the blower is provided on the upper surface of the housing.

Looking at the housing from the front, the left half space of the machine room is the left machine room, the right half space is the right machine room, the left half space of the blower room is the left blower room, and the right half space of the blower room is right. When the blower room is used, the first heat exchanger is arranged in the left machine room, the second heat exchanger is arranged in the right machine room, the first blower is arranged in the left blower room, and the right blower is arranged. A second blower is arranged in the room.

The first heat exchanger and the second heat exchanger are both U-shaped, and are arranged on the bottom plate of the housing so that their open ends face each other. A compressor is installed in each of the left machine room and the right machine room so as to be surrounded by the first heat exchanger and the second heat exchanger. Further, a suction port is provided on a surface of the outdoor unit that faces the first heat exchanger and the second heat exchanger, respectively.

The air outlets of the first blower and the air outlets of the second blower are arranged on the upper surface of the casing at positions symmetrical with respect to the center of the casing in the left-right direction. Further, the air outlet of the first blower is arranged at the center of the upper surface on the left blower room side, and the air outlet of the second blower chamber is arranged on the center of the upper surface on the right blower room side.

The left front pillar is arranged in front of the left machine room, and the right front pillar is arranged in front of the right machine room. Each front pillar is formed by pressing a steel plate and has a vertically long rectangular shape. An opening for maintaining the outdoor unit is provided between the left front pillar and the right front pillar. A service panel is attached to this opening. An electrical equipment box is placed on the back of the service panel. In this electrical component box, the surface facing the service panel is the front side, the opposite surface is the back side, the side close to the first heat exchanger is the left side, and the side close to the second heat exchanger is the right side.

The electrical component box has a rectangular parallelepiped box whose front surface is approximately the same size as the service panel, and is screwed to each of the left front pillar and the right front pillar. This electrical equipment box contains a compressor inverter board that controls the compressor, a fan motor inverter board that controls the blower motor, a smoothing circuit board that smoothes the current rectified by the rectifier, an outdoor unit and an indoor unit. Various electronic components such as a control board for controlling are housed.

In the outdoor unit of the air conditioner, there may be a case where two compressors and two blowers are installed. In this case, the electrical equipment box is provided with two compressor inverter boards and two fan motor inverter boards. is there. In addition, since it is necessary to mount other electronic components on the electrical component box, the number of electronic components mounted on the electrical component box is increasing. Therefore, we would like to make the electrical equipment box larger, but there was a problem that the width in the horizontal direction and the height in the vertical direction could not be increased especially because the size of the electrical equipment box was constrained by the structural condition of the outdoor unit. ..

In order to solve this problem, there is a case where the electrical component box has a multilayer structure toward the inside of the outdoor unit. (See Patent Document 1) In Patent Document 1, the inside of the electrical component box is partitioned by a plate so as to be divided into a first layer, a second layer, and a third layer. This plate serves as a substrate support plate that supports the substrates arranged in each layer. Of these, the substrate arranged in the third layer located on the inner side of the outdoor unit can be in contact with the heat sink on the back surface of the electrical component box, so that heat is easily dissipated. On the other hand, the first layer on the front side of the electrical component box is different from the second and third layers, and the front side of the first layer is exposed when the lid on the front of the electrical component box is removed. Therefore, a main board on which electronic components such as a DIP switch operated by an installer are mounted is arranged. This facilitates the operation when the installer installs or performs maintenance.

However, since tall electronic components such as capacitors are mounted on the main board in the first layer, an insulation distance is secured between the electronic components such as capacitors and the lid that covers the front side of the electrical component box. There is a need to. By enlarging the electrical equipment box, the insulation distance between the electronic parts such as capacitors and the lid of the electrical equipment box can be secured, but the electrical equipment box has a restriction on the structure of the outdoor unit, so make it larger. I can't. Therefore, a method of forming a substrate support plate that supports the main substrate with resin and shortening the distance between the substrate support plate and the main substrate to secure a distance between the electronic components on the main substrate and the front of the electrical component box is proposed. is there. In this method, since the main board can be placed immediately above the board support plate, the distance between the main board and the board support plate can be shortened, and tall electronic components such as capacitors can be placed on the main board. , It is possible to secure an insulation distance between the tall electronic component and the housing of the electrical component box.

JP, 2009-296799, A

As described above, the electrical component box is formed in a multi-layered structure, the main substrate is arranged on the first layer exposed when the lid on the front of the electrical component box is removed, and the substrate support plate supporting the main substrate is provided. If it is made of resin, the strength of the resin is weak when the installer removes or inserts the communication cable from the connector on the main board or pushes the DIP switch. There is a problem that the support plate is easily bent.

Therefore, in the present invention, the electrical equipment box is formed in a multi-layer structure, and the first layer located on the front side of the electrical equipment box is provided with a substrate support plate that supports a main substrate on which tall electronic components such as capacitors are mounted. When formed in (1), the object is to provide an outdoor unit for an air conditioner equipped with an electrical component box that secures the strength of this substrate support plate.

The present invention has a box-shaped housing having a front surface, a back surface, a top surface, a right side surface, and a left side surface. Inside the housing, a front surface, a back surface, a top surface, a right side surface, and a left side surface are provided. In an outdoor unit of an air conditioner that has a box-shaped electrical component box and has a substrate support plate that partitions the inside of the electrical component box into the front side and the back side of the electrical component box, the substrate support plate is made of resin Board supporting resin plate and a board supporting metal plate made of metal, the board supporting resin plate is arranged on one side of the left and right side surfaces of the electrical component box, and the board supporting metal plate supports the board. The main board is placed on the other side of the left and right sides of the electrical equipment box adjacent to the resin plate, the main board is placed on the board supporting resin board, and the left and right ends of the board supporting resin board are It is characterized in that the end portion on the side surface side is overlapped with the end portion on one side surface side of the electrical component box among the end portions in the left-right direction of the substrate supporting metal plate.

Further, the present invention is characterized in that a step portion is formed on an end portion of the board supporting metal plate that overlaps the board supporting resin plate, and the step portion is located on the front side of the electrical component box with respect to the board supporting resin plate.

Further, according to the present invention, the substrate supporting resin plate is provided with a claw portion projecting to the front side of the electrical equipment box in a portion overlapping the substrate supporting metal plate, and a hole is formed in a portion of the substrate supporting metal plate overlapping the substrate supporting resin plate. Is provided, and the claw portion is locked to the peripheral edge of the hole portion.

Further, the present invention is characterized in that a support member that connects the board supporting resin plate and the back surface of the electrical component box is provided in a portion where the board supporting resin plate and the board supporting metal plate overlap each other.

By the outdoor unit of the air conditioner of the present invention as described above, the electrical equipment box is formed in a multi-layered structure, and the main board on which tall electronic components such as capacitors are mounted is arranged in the front side space in the electrical equipment box. When the substrate supporting plate that supports the main substrate is formed of resin, it is possible to provide the outdoor unit of the air conditioner including the electrical component box that secures the strength of the substrate supporting plate. Furthermore, the outdoor member of the air conditioner that further secures the strength can be provided by the support member supporting the substrate support plate.

It is a front side appearance perspective view of the outdoor unit of the air conditioner concerning the embodiment of the present invention. It is a rear side appearance perspective view of the outdoor unit of the air conditioner. It is the sectional view on the AA line of FIG. It is a front side external appearance perspective view in the state where the front pillar was attached to the base panel, the front pillar, and the side panel. It is a front view showing the inside of the back side of the electrical equipment box of the air conditioner. It is a rear side external appearance rear view of the electric component box of the said air conditioner. It is the perspective view which showed the inside of the front side of the electrical equipment box of the said air conditioner. It is the front view which showed the inside of the front side of the electrical equipment box of the said air conditioner. It is sectional drawing of the electrical equipment box of the said air conditioner. (A) is a front view showing in detail a part of the front side of the electrical component box of the air conditioner, and (b) is a detailed view of a part of the front side of the electrical component box of the air conditioner from below. It is a bottom view shown in FIG.

Hereinafter, an embodiment of an outdoor unit for an air conditioner according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. Further, the vertical direction, the horizontal direction, and the front-back direction of the outdoor unit of this embodiment will be described based on the coordinate axes shown in FIG.

As shown in FIGS. 1 to 4, an outdoor unit 1 of this air conditioner has a horizontally long rectangular parallelepiped casing 2 in the left-right direction (the left-right direction in FIG. 1), and the inside of the casing 2 exchanges heat. It is divided into a machine room MC having a device 3 and a compressor (not shown), and a blower room FC having a blower 4. In this embodiment, the machine room MC is arranged in the lower part of the housing 2, and the blower room FC is arranged above the machine room MC.

In FIG. 1, as viewed from the front of the housing 2, the left half space of the machine room MC is the left machine room ML, the right half space is the right machine room MR, and the left half space of the blower room FC is the left blower room FL, With the right half space of the blower room FC as the right blower room FR, the first heat exchanger 3L is arranged in the left machine room ML of the housing 2, and the second heat exchanger 3R is arranged in the right machine room MR. ing.

Further, the first blower 4L is arranged in the left blower chamber FL, the second blower 4R is arranged in the right blower chamber FR, and the first air of the first blower 4L is arranged on the upper surface of the housing 2. The air outlet 11L and the second air outlet 11R of the second blower 4R are provided respectively.

The housing 2 has, as a basic structure, a rectangular base panel 20 installed on a surface to be installed, a left side panel 30L standing on the left end of the base panel 20, and a right side end of the base panel 20. A right side panel 30R that is erected, a front beam 40F (see FIG. 4) horizontally laid between the front ends of the left side panel 30L and the front ends of the right side panels 30R, and a rear end of the left side panel 30L. The rear beam 40R (see FIG. 4) is provided horizontally between the rear end of the right side panel 30R and the rear end.

As shown in FIG. 4, the base panel 20 is formed by pressing or welding a steel plate, and is formed in a horizontally long rectangular shape. On the peripheral edge of the base panel 20, a not-shown locking portion to which a panel or the like is screwed is erected substantially vertically over the entire circumference.

The base panel 20 is formed with a front leg 22 and a rear leg 23 when the outdoor unit 1 is installed on an installation surface (not shown). The front leg 22 is bent substantially at a right angle from the front end side (the front side in FIG. 4) of the base panel 20 to the lower side, and is formed continuously over the left and right. The rear legs 23 are bent substantially at right angles from the rear end side (the back side in FIG. 4) of the base panel 20 and are formed continuously at both left and right ends.

Referring also to FIG. 3, the heat exchanger 3 includes two heat exchanger units, a first heat exchanger 3L and a second heat exchanger 3R. The first heat exchanger 3L includes a left front surface portion 31L arranged along the left front end of the base panel 20, a left side surface portion 32L arranged along the left end of the base panel 20, and a left rear end of the base panel 20. And a left rear surface portion 33L disposed along the front surface, and is formed in a U-shape when viewed from above (in the paper surface direction of FIG. 3 ).

The first heat exchanger 3L includes a first end plate 34L (hereinafter also referred to as a front end portion 34L) attached to an end portion of the left front surface portion 31L and a second end plate attached to an end portion of the left rear surface portion 33L. It is fixed to the base panel 20 via an end plate 35L (hereinafter, also referred to as a rear end portion 35L).

The second heat exchanger 3R includes a right front surface portion 31R arranged along the right front end of the base panel 20, a right side surface portion 32R arranged along the right end of the base panel 20, and a right rear end of the base panel 20. And a right rear surface portion 33R arranged along the right side, and is formed in a U shape in a top view (direction of paper surface of FIG. 3).

The second heat exchanger 3R includes a third end plate 34R (hereinafter also referred to as a front end portion 34R) attached to an end portion of the right front surface portion 31R, and a fourth end plate attached to an end portion of the right rear surface portion 33R. It is fixed to the base panel 20 via an end plate 35R (hereinafter, also referred to as a rear end portion 35R).

Referring again to FIGS. 1 to 4, the left side panel 30L and the right side panel 30R have the same basic shape and are symmetrically arranged. Therefore, in the following, the left side panel 30L will be described. The configuration of will be described.

The left side panel 30L is formed by pressing a metal plate, and its width is almost the same as the length of the left end of the base panel 20, and is formed in a vertically long rectangular shape extending from the lower end to the upper end of the housing 2. There is.

The left side panel 30L has a pair of supporting columns 31 and 32 that engage with the corners of the base panel 20, and a grill section that protects the left side surface 32L of the first heat exchanger 3L between the supporting columns 31 and 32. 33 and a panel portion 34 that closes the left side surface of the blower chamber FC in FIG. 2 are formed. The lower ends of the support columns 31 and 32 are engaged with the side surfaces of the front legs 22 and the rear legs 23 of the base panel 20, and thus project from the lower ends of the left side panel 30L.

The grill portion 33 has a lattice-shaped opening from the lower end to the upper end of the first heat exchanger 3L, and the first heat exchanger 3L is exposed to the outside through the grill portion 33. The panel portion 34 is a panel surface that closes the right side surface of the blower chamber FC.

Referring to FIG. 4, the front beam 40F is made of an angle steel material having an L-shaped cross section in this example, and is horizontally spanned between the column portion 31 of the left side panel 30L and the column portion 31 of the right side panel 30R. Has been done. One end of the front beam 40F is screwed to the pillar portion 31 on the front end side of the left side panel 30L, and the other end is screwed to the pillar portion 31 on the front end side of the right side panel 30R.

The rear beam 40R is also made of an angle steel material having an L-shaped cross section, and is horizontally spanned between the column 32 of the side panel 30L and the column 32 of the right side panel 30R. One end of the rear beam 40R is screwed to the support portion 32 on the rear end side of the left side panel 30L, and the other end is screwed to the support portion 32 on the rear end side of the right side panel 30R.

In this embodiment, the front beam 40F and the rear beam 40R are arranged along the boundary between the machine room MC and the blower room FC of the housing 2, and the front beam 40F and the rear beam 40R are parallel to each other on the same plane, Moreover, the base panel 20 and the base panel 20 are also arranged in parallel.

The front beam 40F and the rear beam 40R are provided with a first motor bracket 41L for mounting the first blower 4L and a second motor bracket 41R for mounting the second blower 4R. In this embodiment, the first motor bracket 41L is arranged in the left blower chamber FL, and the second motor bracket 41R is arranged in the right blower chamber FR.

Since both the first motor bracket 41L and the second motor bracket 41R have the same configuration, one first motor bracket 41L will be described below. The first motor bracket 41L has a pair of beam members 411, 411 that are hung in parallel between the front beam 40F and the rear beam 40R, and both ends of the beam members 411, 411 are opposite to the front beam 40F and the rear beam 40R. Each is fixed with screws.

The fan motor M of the blower 4L is mounted on the first motor bracket 41L, and a blower fan (not shown) is attached to the rotation shaft OL of the fan motor M. Similarly, the fan motor M of the blower 4R is mounted on the second motor bracket 41R, and a blower fan (not shown) is attached to the rotation axis OR of the fan motor M.

A cylindrical bell mouth BM (BML, BMR) (see FIG. 5) is provided on the outer periphery of each blower fan 4 (4L, 4R). In this embodiment, the air outlet 11 (11L, 11R) corresponds to the inner diameter (φ1 in FIG. 5) of the bell mouth BM. In addition, in FIG. 5, the position of the outline of the bell mouth BM is indicated by a dashed line.

In this embodiment, in the bell mouth BM, the opening diameter of the air outlet 11 gradually decreases from the lower end (lower end in FIG. 5B) to the upper end (upper end in FIG. 5B) in the axial direction. Is formed on. According to this, when the blower 4 is driven, the air that has passed through the heat exchangers 3L and 3R from the outer surface of the housing 2 and has undergone heat exchange is blown from the air outlet 11 to the outside of the housing 2 via the blower 4. Is discharged to.

By the way, when the two blowers 4L and 4R are mounted on the front beam 40F and the rear beam 40R, the bending moment increases from the both ends toward the center of the front beam 40F and the rear beam 40R, and the front beam 40F and the rear beam 40R are distorted. Bending may occur.

Therefore, in order to increase the mechanical strength of the front beam 40F and the rear beam 40R, the housing 2 is provided with the front pillar 50 and the rear pillar 60. The front pillar 50 includes a left front pillar 50L arranged on the front side of the left machine room ML and a right front pillar 50R arranged on the front side of the right machine room MR.

Next, the configuration of each of the front pillars 50L and 50R will be described. Since the basic configurations of the front pillars 50L and 50R are the same and have a bilaterally symmetrical shape, one left front pillar 50L will be described.

The left front pillar 50L is made of, for example, one steel plate press-molded, and is formed in a vertically long rectangular shape. The left front pillar 50L includes a grill portion 51 that protects the left front surface portion 31L of the first heat exchanger 3L. In this embodiment, the grill portion 51 is formed in a lattice shape having eight through holes that are cut out in a square shape.

The left end of the left front pillar 50L is provided with a first flange portion 52 for screwing the left front pillar 50L to the column portion 31 of the left side panel 30L. At the right end of the left front pillar 50L, a second flange portion 53 to which service panels 70A and 70B and an electrical component box 80, which will be described later, are attached is provided. A third flange portion 54 for screwing to the front beam 40F is further provided on the upper end of the left front pillar 50L.

The lower end of the left front pillar 50L is screwed to the base panel 20, the upper end is screwed to the front beam 40F through the third flange portion 54, and the first flange portion 52 is further fixed to the column portion 31 of the left side panel 40L. It is screwed in the abutting state.

As shown in FIG. 2, the rear pillar 60 is formed by pressing a steel plate, for example, and has a vertically long rectangular shape in which the lower end is fixed to the base panel 20 and the upper end is fixed to the rear beam 40R.

The rear pillar 60 includes a panel body 61 that closes the back opening 2B existing between the first heat exchanger 3L and the second heat exchanger 3R at the center. The left end of the rear pillar 60 in FIG. 2 is formed with a first flange portion 62 screwed to the end plate 35L of the first heat exchanger 3L, and the right end of the rear pillar 60 in FIG. A second flange portion 63 screwed to the end plate 35R of the container 3R is formed. The upper end of the rear pillar 60 is screwed to the rear beam 40R.

The rear pillar 60 has a lower end screwed to the base panel 20, an upper end screwed to the rear beam 40R, a first flange portion 62 screwed to the end plate 35L of the first heat exchanger 3L, and a second flange portion. 63 is screwed to the end plate 35R of the second heat exchanger 3R. As a result, as shown in FIG. 2, the rear opening 2B existing between the first heat exchanger 3L and the second heat exchanger 3R can be closed by the rear pillar 60.

According to this, the two front pillars 50L and 50R are screwed between the base panel 20 and the front beam 40F, and the rear pillar 60 is locked between the base panel 20 and the rear beam 40R. The mechanical strength is increased, and it is possible to prevent the housing 2 from being deformed or bent.

Between the rear pillar 60 and the left and right side panels 50L and 50R, a protective grill (not shown) that protects the rear surface portions 33L and 33R of the first heat exchanger and the second heat exchangers 3L and 3R is screwed. Although it has been stopped, the description of the present invention is omitted because it does not require any particular explanation.

Referring again to FIGS. 1 to 4, a front opening 2A (see FIG. 4) for maintenance is provided between the left front pillar 50L and the right front pillar 50R of the housing 2. Therefore, the service panel 70 is attached to the front opening 2A.

The service panel 70 is composed of two panel materials having an upper service panel 70A closing the upper side of the front opening 2A and a lower service panel 70B closing the lower side of the front opening 2A.

The upper service panel 70A and the lower service panel 70B are substantially square metal panels. Left ends (left ends in FIG. 1) of the upper service panel 70A and the lower service panel 70B are screwed to the second flange portion 53 of the left front pillar 50L. Right ends (right ends in FIG. 1) of the upper service panel 70A and the lower service panel 70B are screwed to the second flange portion 53 of the right front pillar 50R.

In this embodiment, the lower left corner of the lower service panel 70B is cut into an L shape, and a notch portion 73 is fitted with a conduit panel 74 for connecting a conduit pipe (not shown).

As shown in FIG. 3, an electrical component box 80 is installed on the back surface of the upper service panel 70A (the surface facing the inside of the housing 2). The electrical component box 80 is a rectangular parallelepiped box body having substantially the same size as the upper service panel 70A, and is screwed to the second flange portions 53, 53 of the left and right front pillars 50L, 50R.

A front panel 90F is arranged on the front side (front side in FIG. 1) of the blower chamber FC of the housing 2, and a rear panel 90R is arranged on the back side (front side in FIG. 2) of the blower chamber FC. ing. Both the front panel 90F and the rear panel 90R are horizontally long rectangular metal panels that cover the front side and the back side of the blower chamber FC, and are screwed to the side panels 30L and 30R, respectively.

A top panel 91 is attached to the upper surface of the blower chamber FC. The top panel 91 is made of a horizontally long rectangular metal frame that covers the upper surface of the housing 2, and has a square first opening 92L that exposes the first air outlet 11L and a second square opening that exposes the second air outlet 11R. The opening 92R is formed. In this embodiment, a reinforcing beam 94 is formed between the openings 92L and 92R, and protective grills 93L and 93R are screwed into the left and right openings 92L and 92R with the beam 94 interposed therebetween. It has been stopped.

A feature of the present invention is that when a substrate supporting plate that supports a main substrate on which tall electronic components such as capacitors are mounted is formed of resin, an air conditioner equipped with an electrical component box that secures the strength of the substrate supporting plate is provided. To provide an outdoor unit.

As shown in FIGS. 3 and 9, the electrical component box 80 is disposed on the back side of the upper service panel 70A, the surface facing the upper service panel 70A is the front surface 80a, and the opposite surface is the back surface 80b. The surface facing 91 becomes the upper surface 80e. A surface near the left side panel 30L is a left side surface 80d, and a surface near the right side panel 30R is a right side surface 80c. As shown in FIGS. 5 and 6, the electrical component box 80 is a rectangular parallelepiped box made of sheet metal. Air inlets 87a, 87b for taking in air into the box are provided at positions near the right side surface 80c and the left side surface 80d of the lower part of the back surface 80b of the electrical component box 80, respectively. Exhaust ports 88a and 88b for discharging air from the inside of the box are provided at positions near the right side surface 80c and the left side surface 80d of the upper portion of 80b. An air passage 89 that connects the intake ports 87a and 87b and the exhaust ports 88a and 88b is formed inside the electrical component box 80. As shown in FIG. 9, the inside of the electrical component box 80 has a two-layer structure in which a back side space arranged on the back side and a front side space arranged on the front side are partitioned by a substrate support plate 150. There is. The substrate support plate 150 is supported by a columnar support member 153. By having one end of the support member 153 contact with the vicinity of the center of the lower end of the substrate support plate 150 (the lower part of the left end portion 152e of the substrate support resin plate 152 described later) and the other end with the back surface 80b of the electrical component box 80, The substrate support plate 150 and the back surface 80b are connected. Inside the electric component box 80, compressor inverter boards 82a, 82b for controlling a compressor (not shown), and fan motor inverter boards 83a, 83b for controlling a fan motor M for driving a blower fan (not shown), Smoothing circuit boards 84a and 84b for smoothing the current obtained by rectifying the AC power source, a main board 112 for communicating with an indoor unit (not shown), and the like are housed. In the present embodiment, two fan motors M and two compressors (not shown) are installed in the outdoor unit 1. Therefore, two inverter boards 82a and 82b for compressors, two inverter boards 83a and 83b for fan motors, and two smoothing circuit boards 84a and 84b are provided. In the present invention, a board on which electronic components such as compressor inverter boards 82a and 82b and fan motor inverter boards 83a and 83b that generate a large amount of heat are mounted is called a heat generating board. A board on which electronic components such as the smoothing circuit boards 84a and 84b that generate a small amount of heat are mounted is called a control board in the present invention. In this embodiment, the smoothing circuit board is used as the control board, but the present invention is not limited to this, and any board having an electronic component such as a rectifying circuit board that generates a small amount of heat can be used. Further, although the support member 153 is in contact with the lower end of the substrate support plate 150 in the present embodiment, the present invention is not limited to this, and the respective end portions of the substrate support metal plate 151 and the substrate support resin plate 152 described later are provided. Need only be in contact with the overlapping portion, and may be provided between the two heat generating substrates in the back side space in the left-right direction.

The inside of the electrical component box 80 is divided into a front side and a rear side of the electrical component box, and a board support plate 150 forming a front side space and a rear side space is divided into left and right as shown in FIG. A board supporting metal plate 151 made of metal is arranged on the surface side, and a board supporting resin plate 152 made of resin is arranged on the right side surface of the electrical component box. The board supporting metal plate 151 is provided with screw holes at two corners on the left end, and is overlapped with the screw holes provided on the upper and lower ends of the side wall on the left side of the housing of the electrical component box 80, so that the electrical component box 80 is It is screwed on. On the other hand, the board supporting resin plate 152 is provided with screw holes at the two corners on the right end, and is overlapped with the screw holes provided on the upper and lower ends of the side wall on the right side of the housing of the electrical component box 80 to be overlapped. It is screwed to 80.

Two filter substrates 111a and 111b are arranged side by side in the left-right direction on the substrate supporting metal plate 151 via a spacer, and the left side is the first filter substrate 111a and the right side is the second filter substrate 111b. The two filter substrates 111a and 111b are substrates on which an electronic circuit for removing noise entering from a commercial power source or the like is mounted. The two filter substrates 111a and 111b are supported by the substrate supporting metal plate 151 so as to be arranged in the front space because they need to be connected to the power supply terminal 121 by a cable. The power supply terminal 121 is a terminal that relays when an electric device outside the electrical component box 80 is connected to a board or an electronic component arranged inside the electrical component box 80 with a cable (not shown).

On the board supporting resin plate 152, the main board 112 on which the tall capacitor 131 is mounted is arranged. The main board 112 is a board that communicates with an indoor unit (not shown), and a plurality of connectors 135 into which communication cables (not shown) are inserted are arranged on the outer periphery of the main board 112. When the board supporting metal plate 151 is arranged on the left side and the board supporting resin plate 152 is arranged on the right side as described above, the connector 135 installed in the vicinity of the board supporting metal plate 151 among the connectors 135 is installed. Even if a trader inserts and removes the communication cable at the time of installation or maintenance, a left end portion 152e of the board supporting resin plate 152, which will be described later, overlaps the board supporting metal plate 151, and claw portions 152a to 152d of the left end portion 152e, which will be described later, are formed on the board. Since the substrate supporting resin plate 152 is reinforced by being locked to the supporting metal plate 151, it is difficult to bend. No electronic component is provided on the left end portion 152e of the board supporting resin plate 152. Further, since the substrate supporting resin plate 152 is supported by the supporting member 153 from the rear surface 80b side of the electrical component box 80, the substrate supporting resin plate 152 is hard to bend. In addition, switches such as the DIP switch 132 and the tact switch 133 that are operated by an installer during installation and maintenance are arranged on the upper portion of the main board 112 near the center in the left-right direction. Further, four 7-segment LEDs 134 are arranged in the vicinity of the dip switch 132 and the tact switch 133 on the main board 112 to display the state of the main board 112 such as an error. In this embodiment, the DIP switch 132, the tact switch 133, and the like are arranged near the side wall of the housing of the electrical component box 80, and when the DIP switch 132 or the tact switch 133 is pressed, the substrate support that supports the main substrate 112 is provided. The resin plate 152 is hard to bend. If the DIP switch 132 and the tact switch 133 are located far from the housing of the electrical component box 80 and near the board supporting metal plate 151, the board supporting resin plate 152 is reinforced by the board supporting metal plate 151 as described later. Therefore, even if the dip switch 132 or the tact switch 133 is pressed, the substrate supporting resin plate 152 is hard to bend. Further, since the substrate supporting resin plate 152 is supported by the supporting member 153 from the rear surface 80b side of the electrical component box 80, the substrate supporting resin plate 152 is hard to bend.

Next, a portion where the substrate supporting metal plate 151 and the substrate supporting resin plate 152 overlap each other will be described based on FIGS. 10(a) and 10(b). 10A is a front view of a part of the substrate supporting metal plate 151 and the substrate supporting resin plate 152 as seen from the front side, and FIG. 10B is taken from the line AA in FIG. 10A. FIG. As shown in FIGS. 10A and 10B, a stepped portion 151e at the right end of the substrate supporting metal plate 151, which will be described later, is superposed on the left end 152e of the substrate supporting resin plate 152 from the front side of the outdoor unit. .. In this way, by disposing the board supporting resin plate 152 near the rear surface 80b of the electrical component box 80, the insulation distance between the electronic components mounted on the main substrate 112 and the lid (not shown) covering the upper surface side of the electrical component box 80 can be increased. Can be secured. At the right end of the substrate supporting metal plate 151, a step portion 151e is formed by bending the other portion toward the front side of the outdoor unit, and the right end of the step portion 151e is at the front side of the outdoor unit 1. The flange 151f bent toward is formed. Further, on the front side of the left end portion 152e of the substrate supporting resin plate 152, there are a total of four locations, one in the lower portion of the outdoor unit 1 in the vertical direction, two in the middle portion and one in the upper portion, and project toward the front side of the outdoor unit 1. L-shaped claw portions 152a to 152d having tips extending upward are formed, and four claw portions 152a to 152d on the substrate supporting resin plate 152 are overlapped with the stepped portion 151e of the substrate supporting metal plate 151, respectively. Holes 151a to 151d are formed at positions (one lower portion, two central portions, and one upper portion of the left end portion 152e of the substrate supporting resin plate 152). The claw portions 152a to 152d are inserted into the hole portions 151a to 151d and then slid upward and locked to the peripheral edges 151g to 151j of the hole portions 151a to 151d, so that the substrate supporting resin plate 152 supports the substrate. It is supported by the metal plate 151. Further, the flange 151f of the board supporting metal plate 151 abuts on the rib 152f on the left end side of the board supporting resin plate 152, thereby performing lateral positioning. Since the step portion 151e of the board supporting metal plate 151 is arranged from the upper part to the lower part of the electrical component box 80, this serves as a supporting plate for supporting the board supporting resin plate 152 and has a role of reinforcing the board supporting resin plate 152. As a matter of fact, when the installer inserts a communication cable (not shown) into the connector 135 mounted on the main board 112, the board supporting resin plate 152 becomes difficult to bend. In this embodiment, the board supporting resin plate 152 is arranged on the back side of the board supporting metal plate 151. This is because the flange 151f at the right end of the board supporting metal plate 151 is provided in order to secure an insulation distance between tall electronic components such as the capacitor 131 in the board supporting resin plate 152 and the housing of the electrical component box 80. This is to form. In order to secure the insulation distance between the electronic components mounted on the main board 112 and the front surface 80a of the housing of the electrical component box 80, it is necessary to dispose the substrate supporting resin plate 152 as close to the rear surface 80b of the electrical component box 80 as possible. Therefore, the board supporting resin plate 152 is provided at a position in contact with the housing of the electrical component box 80. Further, if the board supporting metal plate 151 is disposed closer to the back surface 80b of the housing than the board supporting resin plate 152, the flange 151f extends toward the back surface 80b of the housing, and is located in the back side space of the electrical component box 80. Contact with the cables to be wired may cause damage such as scratches. Therefore, in the present embodiment, the board supporting resin plate 152 is arranged on the back side of the board supporting metal plate 151.

Thus, the filter substrates 111a and 111b and the main substrate 112 are arranged in the front space. On the other hand, in the rear space, compressor inverter boards 82a, 82b for controlling a compressor (not shown), fan motor inverter boards 83a, 83b for controlling a fan motor M for driving a blower fan (not shown), and electrical components Smoothing circuit boards 84a and 84b for smoothing the current supplied to the boards in the box 80 are arranged. In the present embodiment, two fan motors M and two compressors (not shown) are installed in the outdoor unit 1. Therefore, two inverter boards 82a and 82b for compressors, two inverter boards 83a and 83b for fan motors, and two smoothing circuit boards 84a and 84b are provided. The compressor inverter boards 82a and 82b and the fan motor inverter boards 83a and 83b are heating boards that generate a large amount of heat. The smoothing circuit boards 84a and 84b are control boards that generate a small amount of heat.

FIG. 5 shows a state in which components such as a lid (not shown) for covering the front side of the electrical component box 80 and the filter substrates 111a and 111b, the main substrate 112, and the substrate supporting plate 150 are removed from the front space. .. Intakes 87a and 87b for taking air into the electrical component box 80 are provided at positions near the right side surface 80c and the left side surface 80d of the lower portion of the back surface 80b of the electrical component box 80. Exhaust ports 88a and 88b for exhausting air from the electrical component box 80 are provided at positions near the right side surface 80c and the left side surface 80d of the upper portion of the back surface 80b of the electrical component box 80, respectively. Inside the electrical component box 80, a smoothing circuit board 84b is provided between the intake port 87b and the exhaust port 88b on the right side face 80c side of the electrical component box 80, and between the intake port 87a and the exhaust port 88a on the left side face 80d side. , 84a are arranged. Reactors 86a and 86b are arranged above the smoothing circuit boards 84a and 84b, respectively. Further, the compressor inverter boards 82a, 82b and the fan motor inverter boards 83a, 83b are arranged vertically, the compressor inverter boards 82a, 82b are on the upper side, and the fan motor inverter boards 83a, 83b are on the lower side. It is arranged. The compressor inverter boards 82a and 82b and the fan motor inverter boards 83a and 83b form a set, and two sets are arranged between the smoothing circuit boards 84a and 84b. In this embodiment, the first smoothing circuit board 84a and the first compression circuit 84a and the first compression circuit are provided in the ventilation path connecting the intake ports 87a, 87b and the exhaust ports 88a, 88b from the left side surface 80d side to the right side surface 80c side of the electrical component box 80. The machine inverter board 82a and the first fan motor inverter board 83a, the second compressor inverter board 82b, the second fan motor inverter board 83b, and the second smoothing circuit board 84b are arranged in this order. The electrical equipment box 80 is provided with intake ports 87a and 87b for taking air into the electrical equipment box 80 below the smoothing circuit boards 84a and 84b, and above the smoothing circuit boards 84a and 84b. Since the exhaust ports 88a and 88b for exhausting air from the inside of the electric component box 80 are provided, the air 89a flows into the electric component box 80 through the intake ports 87a and 87b and rises upward of the electric component box 80. , Through the exhaust ports 88a and 88b to the outside of the electrical component box 80. Therefore, the heat generated in the compressor inverter boards 82a and 82b is discharged to the outside of the electric component box 80 without affecting the fan motor inverter boards 83a and 83b on the windward side. Since the fan motor inverter boards 83a, 83b generate less heat than the compressor inverter boards 82a, 82b, the heat given to the compressor inverter boards 82a, 82b on the leeward side is less affected. The heat generated in the reactors 86a and 86b is discharged to the outside of the electrical component box 80 without affecting the smoothing circuit boards 84a and 84b on the windward side.

Further, as shown in FIG. 6, an opening 85 is formed in the central portion 80bc of the back surface 80b of the electrical component box 80. In the opening 85, the first compressor inverter board 82a and the first fan motor inverter board 83a, and the electronic components mounted on the second compressor inverter board 82b and the second fan motor inverter board 83b. A heat sink 81 is in contact therewith. The heat sink 81 is made of aluminum, and the heat radiation fins 81 a project from the upper part to the lower part of the back surface 80 b of the electrical component box 80 and are arranged in the internal space of the outdoor unit 1. The heat radiation fin 81a is formed by a plurality of plate-shaped convex portions, and the convex portions are formed so as to extend in the vertical direction and are arranged in parallel in the horizontal direction. Left and right ends 80ba and 80bb of the rear surface 80b of the electrical component box 80, on which the heat sink 81 is not disposed, are flat surfaces. Intake ports 87a and 87b are provided at the lower portions of the left and right ends 80ba and 80bb, respectively, and exhaust ports 88a and 88b are provided at the upper portions thereof. Further, inside the electrical component box 80, smoothing circuit boards 84a and 84b are provided at positions facing the flat surface. In the present embodiment, the heat sink 81 is arranged at the central portion 80bc of the rear surface 80b of the electrical component box 80, so that the heat sinks are disposed at both ends 80ba, 80bb of the rear surface 80b of the conventional electrical component box. As compared with the case, as shown by the thick line arrow in FIG. 3, the air 89a sucked through the through hole of the grill portion 51 on the front side of the outdoor unit 1 easily flows to the back surface 80b of the electrical component box 80. Then, as shown in FIG. 6, the air that has been sucked in through the inlets in the left and right directions of the electrical component box 80 and has flowed above the heat sink 81 flows upward by the blower 4, and therefore flows to the back side of the heat sink 81. The heat dissipation efficiency of the heat sink 81 can be improved. Further, as shown in FIG. 6, on both sides of the heat radiation fin 81a of the heat sink 81, the air flowing from the lower side to the upper side of the electrical component box 80 enters the electrical component box 80 from the intake ports 87a and 87b at the bottom, so At the center of both left and right ends 80ba, 80bb of 80b, only air in the left-right direction toward the heat radiation fin 81a of the heat sink 81 does not collide with air in different directions. Also easily flows to the radiation fin 81a. Further, since the first compressor inverter board 82a and the first fan motor inverter board 83a are adjacent to the second compressor inverter board 82b and the second fan motor inverter board 83b, one heat sink 81 is provided. Further, by disposing the heat sink 81 in the center of the back surface 80b of the electrical component box 80, it is easy to balance the left and right weights of the electrical component box 80, and the electrical component box 80 is easily installed.

As described above, according to the present invention, the electrical component box 80 is formed in a multi-layered structure, and the board support plate 150 partitions the interior of the electrical component box 80 into a front side space and a rear side space. A substrate supporting resin plate 152 made of resin and a substrate supporting metal plate 151 made of metal are provided. Of these, the main substrate 112 is arranged on the substrate supporting resin plate 152 so that the main substrate 112 is tall. The insulating distance between the electronic component and the lid that covers the front side of the electrical component box 80 is ensured, and the step 151e at the right end of the substrate supporting metal plate 151 overlaps with the left end 152e of the substrate supporting resin plate 152. Since the support resin plate 152 can be reinforced by the board supporting metal plate 151, operations such as inserting/removing the communication cable into/from the connector 135 mounted on the main board 112 or pressing the dip switch 132 are performed. However, it is possible to prevent the substrate support plate 150 from bending. Further, since the supporting member 153 supports both the substrate supporting resin plate 152 and the substrate supporting metal plate 151 from below, the substrate supporting plate 150 can be prevented from further bending.

DESCRIPTION OF SYMBOLS 1 Air conditioner outdoor unit 2 Housing 3 Heat exchanger 4 Blower 50 Front pillar 51 Grill part 80 Electrical equipment box 81 Heat sink 82a, 82b Compressor inverter board 83a, 83b Fan motor inverter board 84a, 84b Smoothing circuit board 111a, 111b Filter substrate 112 Main substrate 151 Substrate supporting metal plate 152 Substrate supporting resin plate

Claims (4)

It has a box-shaped housing having a front surface, a back surface, a top surface, a right side surface, and a left side surface,
In the housing,
On the front side of the housing, a box-shaped electrical component box having a front surface, a back surface, a top surface, a right side surface and a left side surface is housed,
In the outdoor unit of the air conditioner, which is provided with a substrate support plate that partitions the inside of the electrical component box into a front side and a back side of the electrical component box,
The substrate support plate has a substrate support resin plate made of resin and a substrate support metal plate made of metal,
The board supporting resin plate is disposed on one side surface of the left and right side surfaces of the electrical component box, the board supporting metal plate is adjacent to the board supporting resin plate, and the other of the left and right side surfaces of the electrical equipment box is Placed on the side,
The main substrate is arranged on the substrate supporting resin plate,
Of the left and right ends of the board supporting resin plate, the end on the other side of the electrical component box is the end on the side of the electric component box of the left and right ends of the substrate supporting metal plate. An outdoor unit of an air conditioner that is characterized by overlapping. A step portion is formed on the board supporting metal plate at an end portion overlapping the board supporting resin plate, and the step portion is located on the front side of the electrical component box with respect to the board supporting resin plate. The outdoor unit of the air conditioner according to 1. The board supporting resin plate is provided with a claw portion projecting to the front side of the electrical equipment box in a portion overlapping the board supporting metal plate,
A hole is provided in a portion of the substrate supporting metal plate that overlaps with the substrate supporting resin plate,
The outdoor unit for an air conditioner according to claim 1 or 2, wherein the claw portion is locked to a peripheral edge of the hole portion. 4. A support member is provided at a portion where the board supporting resin plate and the board supporting metal plate overlap each other so as to connect the board supporting resin plate and a back surface of the electrical component box to each other. An outdoor unit for an air conditioner according to any one of 1.

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