JP2018013308A - Outdoor unit for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, in a wire, CT is mounted on the wire as a current sensor for detecting a current flowing in the wire, and in the conventional wire, the CT was arranged on an inverter substrate, and therefore, the wire needed to be bent in a round shape to a position along the inverter substrate and it was necessary to secure a space for bending the inverter substrate upward, and the inverter substrate became large.SOLUTION: In an outdoor unit for air conditioner including a substrate support plate for partitioning the inside of an electric component box into a front side space and a back side space, between a power terminal in the front side space and an inverter substrate in the back side space, there is a step toward the back surface from the front surface of the electrical component box. At the step, a support member is provided for connecting between the substrate support plate and the back surface of the electrical component box, a substrate is arranged on which CT having a through-hole for detecting a current is mounted on the support member, and a wire for connecting the inverter substrate and the power terminal is inserted in the through-hole of the CT.SELECTED DRAWING: Figure 11

Description

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

  Some outdoor units of an air conditioner have a blower facing upward. This outdoor unit has a horizontally long rectangular parallelepiped housing, and the inside of the housing 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 at the lower part of the housing, the blower room is arranged at the upper part of the machine room, and the air blower outlet of the blower is provided on the upper surface of the housing.

  When viewed 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 a blower room is used, a first heat exchanger is arranged in the left machine room, a second heat exchanger is arranged in the right machine room, a first blower is arranged in the left fan room, and the right blower A second blower is disposed in the chamber.

  Both the first heat exchanger and the second heat exchanger are formed in a U-shape, and are arranged on the bottom plate of the housing so that the open ends thereof 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. Furthermore, the suction inlet is provided in the surface which opposes each of a 1st heat exchanger and a 2nd heat exchanger among the side surfaces of an outdoor unit.

  On the upper surface of the housing, the air blower outlet of the first blower and the air blower outlet of the second blower are arranged at positions that are symmetrical with respect to the center in the left-right direction of the housing. Furthermore, the air blower outlet of the first blower is disposed at the center on the left blower chamber side on the upper surface, and the air blower outlet of the second blower chamber is disposed at the center on the right blower chamber side of the upper surface.

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

  The electrical component box is a rectangular parallelepiped box whose front 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 component box includes a compressor inverter board that controls the compressor, a fan motor inverter board that controls the fan motor, a smooth 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 to be controlled are accommodated.

  There are cases where two compressors and two blowers are provided inside the outdoor unit of the air conditioner. In this case, the electrical component box is provided with two compressor inverter boards and two fan motor inverter boards. is there. Moreover, since it is necessary to mount other electronic components in the electrical component box, the number of electronic components mounted in the electrical component box is increasing. Therefore, I want to increase the size of the electrical component box, but the size of the electrical component box is limited by the structure of the outdoor unit, so there is a problem that the width in the horizontal direction and the height in the vertical direction cannot be increased. .

  In order to solve this problem, there is an electrical component box having a multilayer structure toward the inside of the outdoor unit. (See Patent Document 1) In Patent Document 1, the interior of the electrical component box is partitioned by a plate so as to be divided into a first layer, a second layer, a third layer, and a three-layer structure. This plate is a substrate support plate that supports the substrate disposed in each layer. Of these, the substrate arranged in the third layer on the back side of the electrical component box is easy to dissipate heat by contacting the heat sink on the back of the electrical component box. A heating substrate such as an installed inverter substrate is arranged. On the other hand, since the first layer on the front side of the electrical component box is easily connected to wires for electrical connection with electrical equipment outside the electrical component box, a power supply terminal is disposed. This power supply terminal serves as a relay point that electrically relays, for example, between the inverter board and the compressor and supplies electric power output from the inverter board to a motor that drives the compressor.

  The power terminal and the inverter board are electrically connected by a wire. To control the compressor, it is necessary to know the current flowing through the wire. Therefore, a CT (Current Trans) is attached to the wire as a current sensor for detecting a current flowing through the wire. This CT has a donut shape with a through hole in the center, and the current flowing through the wire is detected by passing the wire through the through hole.

JP 2009-296799 A JP 2014-47991 A

  Conventionally, this CT has been arranged on the inverter board. Therefore, the electrical component box is formed in a multilayer structure, the inverter board on which the CT is mounted is arranged on the third layer on the back side of the electrical component box, and the power supply terminal is on the front side of the electrical component box In order to pass the wire connecting the power supply terminal and the inverter board through the level difference between the first layer and the third layer through the CT through hole, the wire is connected to the inverter board. It was necessary to bend so that they were parallel. Therefore, it is necessary to secure a space for bending the wires on the inverter board, and there is a problem that the inverter board becomes large and the electrical component box becomes large.

  Then, an object of this invention is to provide the outdoor unit of the air conditioner which enabled size reduction of the electrical component box.

  The present invention has a box-shaped housing, and a box-shaped electrical component box having a front surface and a rear surface is accommodated in the housing, and the interior of the electrical component box is arranged on the front side and the back side of the electrical component box. In an outdoor unit of an air conditioner equipped with a partition and a board support plate that forms a front side space and a back side space, an inverter board is provided in the back side space, a power terminal is provided in the front side space, and the power terminal and the inverter There is a step between the front and back of the electrical component box between the boards, and a support member that connects the substrate support plate and the back of the electrical component box is provided at the step, and current is detected in the support member The board | substrate with which the current sensor (CT) with the through-hole for doing was attached is arrange | positioned, The wire which connects an inverter board | substrate and a power supply terminal is penetrated by the through-hole of a current sensor, It is characterized by the above-mentioned.

  Further, the present invention is characterized in that the current sensor is arranged so that the through hole faces the front or back of the electrical component box.

  Further, according to the present invention, when two current sensors are provided on the substrate and a part of the surface of each current sensor facing the front or back of the electrical component box is viewed from the front of the electrical component box, It is characterized by overlapping appearance.

  With the outdoor unit of the air conditioner of the present invention as described above, the electrical component box is formed in a multilayer structure, the inverter board on which the current sensor (CT) is mounted is disposed on the back side of the electrical component box, and the power supply terminal is When placed on the front side of the electrical component box, the inverter board can be made smaller by connecting the wires perpendicular to the inverter board by mounting the CT on the board placed on the support member that supports the board support plate. It is possible to provide an outdoor unit of an air conditioner that can downsize the electrical component box. In addition, by arranging the two CTs installed on the same board so that they partially overlap when viewed from the front to the back of the electrical component box, the terminal of the wire connection destination on the inverter board It is possible to provide an outdoor unit of an air conditioner that can narrow the interval and can further reduce the inverter board.

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

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

  As shown in FIGS. 1 to 4, the outdoor unit 1 of this air conditioner has a rectangular parallelepiped casing 2 that is horizontally long in the left-right direction (left-right direction in FIG. 1), and the inside of the casing 2 performs heat exchange. 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 disposed in the lower part of the housing 2, and the blower room FC is disposed above the machine room MC.

  1, 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. The right half space of the blower room FC is 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.

  In addition, the first blower 4L is disposed in the left blower chamber FL, the second blower 4R is disposed in the right blower chamber FR, and the first air of the first blower 4L is disposed on the upper surface of the housing 2. A blower outlet 11L and a second air blower outlet 11R of the second blower 4R are provided.

  As a basic structure, the housing 2 has a rectangular base panel 20 installed on the installation surface, a left side panel 30L erected on the left end of the base panel 20, and a right end of the base panel 20. A standing right side panel 30R, a front beam 40F (see FIG. 4) horizontally spanned between the front end of the left side panel 30L and the front end of the right side panel 30R, and the rear end of the left side panel 30L A rear beam 40R (see FIG. 4) is provided horizontally between the rear end of the right side panel 30R.

  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. The base panel 20 is provided with a locking portion (not shown) to which a panel or the like is screwed on the periphery thereof, and is erected almost 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 at a substantially 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 from side to side. The rear leg 23 is bent at a substantially right angle from the rear end side (the back side in FIG. 4) to the lower side of the base panel 20, and is 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 portion 31L disposed along the left front end of the base panel 20, a left side surface portion 32L disposed along the left end of the base panel 20, and the left rear end of the base panel 20. The left rear surface portion 33L is arranged along the left side, and is formed in a U-shape when viewed from above (in the paper surface direction in FIG. 3).

  The first heat exchanger 3L includes a first end plate 34L (hereinafter also referred to as a front end 34L) attached to the end of the left front portion 31L and a second end attached to the end of the left rear surface 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 portion 31R disposed along the right front end of the base panel 20, a right side portion 32R disposed 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 disposed along the upper surface of the head, and is formed in a U-shape when viewed from above (in the direction of the plane of the paper in 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 the end portion of the right front portion 31R and a fourth end portion attached to the 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 to FIGS. 1 to 4 again, the left side panel 30L and the right side panel 30R have the same basic shape and are arranged symmetrically. Therefore, in the following description, the left side panel 30L The configuration of will be described.

  The left side panel 30L is formed by press-molding a metal plate, and the width thereof is substantially 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. Yes.

  The left side panel 30L has a pair of support columns 31, 32 that engage with the corners of the base panel 20, and the grill unit that protects the left side surface portion 32L of the first heat exchanger 3L between the support columns 31, 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 column portions 31 and 32 protrude from the lower end of the left side panel 30 </ b> L in order to engage with the side surfaces of the front legs 22 and the rear legs 23 of the base panel 20.

  The portion of the grill portion 33 extending from the lower end to the upper end of the first heat exchanger 3L is opened in a lattice shape, and the first heat exchanger 3L is exposed to the outside through the grill portion 33. The panel unit 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 bridged between the column portion 31 of the left side panel 30L and the column portion 31 of the right side panel 30R. Has been. One end of the front beam 40F is screwed to the support portion 31 on the front end side of the left side panel 30L, and the other end is fixed to the support portion 31 on the front end side of the right side panel 30R.

  The rear beam 40R is similarly made of an angle steel material having an L-shaped cross section, and is horizontally stretched between the support column 32 of the side panel 30L and the support column 32 of the right side panel 30R. One end of the rear beam 40R is screwed to the column part 32 on the rear end side of the left side panel 30L, and the other end is screwed to the column part 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 disposed 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. And it is arrange | positioned so that the base panel 20 may also be 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 disposed in the left blower chamber FL, and the second motor bracket 41R is disposed in the right blower chamber FR.

  Since both the first motor bracket 41L and the second motor bracket 41R have the same configuration, only the first motor bracket 41L will be described below. The first motor bracket 41L has a pair of beam members 411 and 411 spanned in parallel between the front beam 40F and the rear beam 40R, and both ends of the beam members 411 and 411 are in relation 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 shaft 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 FIG. 5, the bell mouth BM represents the position of the outline by a one-dot chain line.

  In this embodiment, in the bell mouth BM, the opening diameter of the air outlet 11 gradually decreases from the lower end in the axial direction (lower end in FIG. 5B) toward the upper end (upper end in FIG. 5B). Is formed. According to this, when the blower 4 is driven, the air exchanged through the heat exchangers 3 </ b> L and 3 </ b> R from the outer surface of the housing 2 is exchanged from the air outlet 11 through the blower 4 to the outside of the housing 2. To be discharged.

  By the way, when the two fans 4L and 4R are mounted on the front beam 40F and the rear beam 40R, the bending moment increases from both ends toward the center of the front beam 40F and the rear beam 40R. There is a risk of bending.

  Therefore, in order to increase the mechanical strength of the front beam 40F and the rear beam 40R, the housing 2 is provided with a front pillar 50 and a 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 configuration of the front pillars 50L and 50R is the same and is bilaterally symmetric, one left front pillar 50L will be described.

  The left front pillar 50L is made, for example, by press-molding a single steel plate, and is formed in a vertically long rectangular shape. The left front pillar 50L includes a grill portion 51 that protects the left front 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 cut out in a square shape.

  A left flange of the left front pillar 50L is provided with a first flange 52 for screwing the left front pillar 50L to the support 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 described later are attached is provided. A third flange portion 54 for screwing to the front beam 40F is further provided at the upper end of the left front pillar 50L.

  The left front pillar 50L has a lower end screwed to the base panel 20, an upper end screwed to the front beam 40F via the third flange portion 54, and the first flange portion 52 to the column portion 31 of the left side panel 40L. Screwed in contact.

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

  The rear pillar 60 includes a panel body 61 that closes the back opening 2B that exists between the first heat exchanger 3L and the second heat exchanger 3R at the center. A first flange portion 62 screwed to the end plate 35L of the first heat exchanger 3L is formed at the left end of the rear pillar 60 in FIG. 2, and a second heat exchange is formed at the right end of the rear pillar 60 in FIG. A second flange portion 63 that is 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 and an upper end screwed to the rear beam 40R, and 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. Thereby, as shown in FIG. 2, the rear opening 2 </ b> B existing between the first heat exchanger 3 </ b> L and the second heat exchanger 3 </ b> R can be closed with 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. Mechanical strength is increased, and deformation and bending of the housing 2 can be prevented.

  A protective grill (not shown) that protects the rear portions 33L and 33R of the first and second heat exchangers 3L and 3R is screwed between the rear pillar 60 and the left and right side panels 50L and 50R. Although it is stopped, the description of the present invention is omitted because it is not particularly necessary.

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

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

  The upper service panel 70A and the lower service panel 70B are made of a substantially square metal panel. The left end (left end in FIG. 1) of the upper service panel 70A and the lower service panel 70B is screwed to the second flange portion 53 of the left front pillar 50L. The right ends (the 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 conduit panel 74 for connecting a conduit pipe (not shown) is fitted into the notch 73.

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

  A front panel 90F is disposed on the front side (front side in FIG. 1) of the blower chamber FC of the housing 2, and a rear panel 90R is disposed on the rear 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 formed of a horizontally long rectangular metal frame that covers the upper surface of the housing 2, and includes a square first opening 92L that exposes the first air outlet 11L and a square second that exposes the second air outlet 11R. An 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.

  The feature of the present invention is that the electrical component box is formed in a multilayer structure, the inverter board is disposed in the back side space of the electrical component box, the power supply terminal is disposed in the front side space, and the front side space and the back side space are disposed. CT (Current Trans), which is a current sensor for detecting the current of the wire that connects the inverter board and the power supply terminal through a certain step, is arranged on the other side of the inverter board, the inverter board is downsized, and the electrical component box is downsized. An object of the present invention is to provide an outdoor unit for an air conditioner that can be made into a single 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 is the upper surface 80e. Further, a surface close to the left side panel 30L is a left side surface 80d, and a surface close to 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. Inlet positions 87a and 87b for taking air into the box are provided at positions near the lower right side 80c and the left side 80d of the lower surface 80b of the electrical component box 80, respectively. Exhaust ports 88a and 88b for exhausting 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 part of 80b. A ventilation path 89 that connects the intake ports 87 a and 87 b and the exhaust ports 88 a and 88 b is formed inside the electrical component box 80. As shown in FIG. 9, the interior of the electrical component box 80 has a two-layer structure that is partitioned by a substrate support plate 150 into a back side space arranged on the back side and a front side space arranged on the front side. Yes. The substrate support plate 150 is supported by a columnar support member 153. One end of the support member 153 is in contact with the vicinity of the center of the lower end of the substrate support plate 150 (lower portion of the left end portion 152e of the substrate support resin plate 152 described later), and the other end is in contact with the back surface 80b of the electrical component box 80. The substrate support plate 150 and the back surface 80b are connected. ing. Inside the electrical component box 80, compressor inverter boards 82a and 82b for controlling a compressor (not shown), and fan motor inverter boards 83a and 83b for controlling a fan motor M for driving a blower fan (not shown), Smoothing circuit boards 84a and 84b that smooth the current obtained by rectifying the AC power supply, a main board 112 that communicates with an indoor unit (not shown), and the like are accommodated. In the present embodiment, the outdoor unit 1 is provided with two fan motors M and two compressors (not shown). Therefore, two compressor inverter boards 82a and 82b, fan motor inverter boards 83a and 83b, and two smoothing circuit boards 84a and 84b are provided. In addition, the board | substrate which mounted electronic components with much emitted-heat amount, such as inverter board | substrates 82a and 82b for compressors, and inverter board | substrates 83a and 83b for fan motors, is called a heat generating board | substrate in this invention. In the present invention, a board on which electronic components with a small amount of heat generation such as the smooth circuit boards 84a and 84b are mounted is called a control board. In this embodiment, a smooth circuit board is used as the control board. However, the present invention is not limited to this, and any board may be used as long as an electronic component such as a rectifier circuit board with a small amount of heat generation is mounted. In this embodiment, the support member 153 is in contact with the lower end of the substrate support plate 150. However, the present invention is not limited to this, and each end portion of the substrate support metal plate 151 and the substrate support resin plate 152 described later is used. May be in contact with the overlapping area, and may be provided between the left and right directions of the two heat generating substrates in the back space.

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

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

  A main substrate 112 on which a tall capacitor 131 is mounted is disposed on the substrate support resin plate 152. 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. As described above, when the substrate supporting metal plate 151 is disposed on the left side and the substrate supporting resin plate 152 is disposed on the right side, the connector 135 is installed with respect to the connector 135 disposed in the vicinity of the substrate supporting metal plate 151. Even if the supplier plugs and unplugs the communication cable at the time of installation or maintenance, a later-described left end 152e on the substrate support resin plate 152 overlaps with the substrate support metal plate 151, and later-described claws 152a to 152d on the left end 152e Since the substrate supporting resin plate 152 is reinforced by being locked to the supporting metal plate 151, it is difficult to bend. Note that electronic components are not provided at the left end 152e of the substrate support resin plate 152. Further, since the substrate support resin plate 152 is supported by the support member 153 from the back surface 80b side of the electrical component box 80, the substrate support resin plate 152 is difficult to bend. In addition, switches that are operated by an installer such as the dip switch 132 and the tact switch 133 at the time of installation or maintenance are arranged on the upper part 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 and the tact switch 133 are disposed in the vicinity of the side wall of the housing of the electrical component box 80, and the substrate support that supports the main substrate 112 when the dip switch 132 and the tact switch 133 are pressed. The resin plate 152 is difficult to bend. If the dip switch 132 and the tact switch 133 are arranged away from the casing of the electrical component box 80 and in the vicinity of the substrate supporting metal plate 151, the substrate supporting resin plate 152 is reinforced by the substrate supporting metal plate 151 as will be described later. Therefore, even if the dip switch 132 or the tact switch 133 is pressed, the substrate support resin plate 152 is hardly bent. Further, since the substrate support resin plate 152 is supported by the support member 153 from the back surface 80b side of the electrical component box 80, the substrate support resin plate 152 is difficult to bend.

  Next, the location where the substrate supporting metal plate 151 and the substrate supporting resin plate 152 overlap will be described with reference to FIGS. 10 (a) and 10 (b). FIG. 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 from the AA line in FIG. It is the principal part bottom view seen. As shown in FIGS. 10A and 10B, a step portion 151e, which will be described later, at the right end of the substrate supporting metal plate 151 is overlapped with the left end portion 152e of the substrate supporting resin plate 152 from the front side of the outdoor unit. . Thus, by disposing the substrate supporting resin plate 152 near the back surface 80b of the electrical component box 80, an insulation distance between an electronic component mounted on the main substrate 112 and a lid (not shown) that covers the upper surface side of the electrical component box 80 is 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 formed on the front side of the outdoor unit 1. A flange 151f bent toward the top is formed. Further, on the front side of the left end portion 152e of the substrate support resin plate 152, the outdoor unit 1 protrudes toward the front side of the outdoor unit 1 in a total of four locations: one in the vertical direction of the outdoor unit 1, two in the middle, and one in the top. L-shaped claw portions 152a to 152d whose tips extend upward are formed, and the four claw portions 152a to 152d on the substrate support resin plate 152 overlap the stepped portion 151e of the substrate support metal plate 151, respectively. Holes 151a to 151d are formed at positions (one lower portion, two middle portions, and one upper portion of the left end portion 152e of the substrate supporting resin plate 152). After the claw portions 152a to 152d are inserted into the holes 151a to 151d and slid upward, the claw portions 152a to 152d are engaged with the peripheral edges 151g to 151j of the holes 151a to 151d, whereby the substrate support resin plate 152 is supported by the substrate. Supported by the metal plate 151. Further, the flange 151 f of the substrate supporting metal plate 151 is positioned in the left-right direction by contacting the rib 152 f on the left end side of the substrate supporting resin plate 152. Since the step portion 151e of the substrate support metal plate 151 is arranged from the upper part to the lower part of the electrical component box 80, this serves as a support plate that supports the substrate support resin plate 152, and serves to reinforce the substrate support resin plate 152. As a result, when the installation contractor inserts a communication cable (not shown) into the connector 135 mounted on the main board 112, the board support resin plate 152 is hardly bent. In this embodiment, the substrate support resin plate 152 is disposed on the back side of the substrate support metal plate 151. This is because the flange 151f at the right end of the substrate supporting metal plate 151 is used to secure an insulation distance between a tall electronic component such as the capacitor 131 in the substrate supporting resin plate 152 and the housing of the electrical component box 80. It is for forming. In order to secure an insulation distance between the electronic component 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 support resin plate 152 as close to the rear surface 80b of the electrical component box 80 as possible. Yes, the substrate support resin plate 152 is provided at a position in contact with the housing of the electrical component box 80. Further, if the substrate supporting metal plate 151 is disposed closer to the rear surface 80b of the housing than the substrate supporting resin plate 152, the flange 151f extends toward the rear surface 80b of the housing, and the rear surface side space of the electrical component box 80 is formed. Contact with cables to be wired may cause defects such as scratches. Therefore, in this embodiment, the substrate support resin plate 152 is disposed on the back side of the substrate support metal plate 151.

  Further, as shown in FIG. 11, the support members 153a and 153b are provided with substrates on which the first CT 154a to the fourth CT 154d having a donut shape having through holes 311a to 311d in the center are mounted. In the through holes 311a to 311d of the CTs 154a to 154d, respective wires connecting a first power terminal 122a and a first compressor inverter board 82a, which will be described later, and a second power terminal 122b and a second compressor inverter board 82b, respectively. 201a to 201d are inserted. The first CT 154a and the second CT 154b are disposed on the same substrate 301a, and a part of the front side of the first CT 154a on the right side of the through hole 311a and a part of the front side of the second CT 154b on the left side of the through hole 311b are electrical components. When viewed from the front-rear direction of the box 80, they appear to overlap. Similarly, the third CT 154c and the fourth CT 154d are arranged on the same substrate 301a and partially overlap when viewed from the front-rear direction of the electrical component box 80. By arranging the CTs 154a to 154d so as to partially overlap when viewed from the front-rear direction of such an electrical component box 80, the interval between the terminals to which the wires 201a to 201d on the inverter board are connected is reduced. In addition, the compressor inverter boards 82a and 82b can be made small, and the space in the electrical component box 80 can be effectively utilized.

  Further, a power supply terminal support plate 155 for installing the first power supply terminal 122 a and the second power supply terminal 122 b is disposed below the substrate support plate 150 in the front side space of the electrical component box 80. The power terminal support plate 155 is disposed so as to be in contact with the lower surface 80f, the right side surface 80c, and the lower side of the left side surface 80d of the electrical component box 80. The power supply terminal support plate 155 faces the rear surface 80b side of the electrical component box 80 between the substrate support plate 150. A step 156 is formed. Furthermore, an opening 157 is formed at the center in the left-right direction of the upper end of the power terminal support plate 155. In addition, the first power supply terminal 122 a and the second power supply terminal 122 b are provided with a plurality of terminals to which the wire 201 can be connected, and devices inside and outside the electrical component box 80 are electrically connected through the wire 201. A wire 201 is inserted through the opening 157 of the power terminal support plate 155.

  Thus, the filter substrates 111a and 111b and the main substrate 112 are arranged in the front space. On the other hand, on the back side space, compressor inverter boards 82a and 82b for controlling a compressor (not shown), fan motor inverter boards 83a and 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 board in the box 80 are arranged. In the present embodiment, the outdoor unit 1 is provided with two fan motors M and two compressors (not shown). Therefore, two compressor inverter boards 82a and 82b, fan motor inverter boards 83a and 83b, 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 heat generating boards that generate a large amount of heat. In addition, the smooth circuit boards 84a and 84b are control boards that generate a small amount of heat.

  FIG. 5 shows a state in which a cover (not shown) for covering the front side of the electrical component box 80 and components arranged in the front side space such as the filter boards 111a and 111b, the main board 112 and the board support plate 150 are removed. . Inlet positions 87 a and 87 b for taking air into the electrical component box 80 are provided at positions near the lower right side 80 c and the left side 80 d of the lower surface 80 b of the electrical component box 80. Exhaust ports 88 a and 88 b that exhaust air from the electrical component box 80 are provided at positions near the upper right side 80 c and the left side 80 d of the upper part of the back surface 80 b of the electrical component box 80. Inside the electrical component box 80, the smoothing circuit board 84b is interposed between the intake port 87b and the exhaust port 88b on the right side 80c side of the electrical component box 80 and between the intake port 87a and the exhaust port 88a on the left side surface 80d side. , 84a are arranged. Reactors 86a and 86b are disposed above the smoothing circuit boards 84a and 84b, respectively. Further, the compressor inverter boards 82a and 82b and the fan motor inverter boards 83a and 83b are arranged in the vertical direction, the compressor inverter boards 82a and 82b are on the upper side, and the fan motor inverter boards 83a and 83b are on the lower side. Has been placed. The compressor inverter boards 82a and 82b and the fan motor inverter boards 83a and 83b constitute a set, and two sets are arranged between the smoothing circuit boards 84a and 84b. In the present embodiment, the first smoothing circuit board 84a and the first compression are provided from the left side 80d side to the right side 80c side of the electrical component box 80 in the ventilation path connecting the intake ports 87a and 87b and the exhaust ports 88a and 88b. The machine inverter board 82a, 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 component box 80 is provided with intake ports 87a and 87b for taking air into the electrical component 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 are provided for exhausting air from the inside, the air 89a flows into the electrical component box 80 from the intake ports 87a and 87b and rises upward from the electrical component box 80. Then, it flows out of the electrical component box 80 through the exhaust ports 88a and 88b. Therefore, the heat generated in the compressor inverter boards 82a and 82b is discharged out of the electrical component box 80 without affecting the fan motor inverter boards 83a and 83b on the windward side. Since the heat generation amount of the fan motor inverter boards 83a and 83b is smaller than that of the compressor inverter boards 82a and 82b, the influence of heat on the compressor inverter boards 82a and 82b on the leeward side is small. In addition, the heat generated in the reactors 86a and 86b is discharged out of the electrical component box 80 without affecting the smooth circuit boards 84a and 84b on the windward side.

  Further, as shown in FIG. 6, an opening 85 is formed in the central portion 80 bc of the back surface 80 b of the electrical component box 80. In the opening 85, the first compressor inverter board 82a and the first fan motor inverter board 83a, the electronic components mounted on the second compressor inverter board 82b and the second fan motor inverter board 83b, and A heat sink 81 in contact therewith is disposed. The heat sink 81 is formed of aluminum, and the heat radiating fins 81 a protrude from the upper part to the lower part of the back surface 80 b of the electrical component box 80 and are disposed in the internal space of the outdoor unit 1. The heat radiating fins 81a are formed of a plurality of plate-like convex portions, and the convex portions are formed to extend in the vertical direction, and are arranged in parallel in the horizontal direction. Of the back surface 80b of the electrical component box 80, the left and right ends 80ba, 80bb where the heat sink 81 is not disposed are flat surfaces. Inlet portions 87a and 87b are provided at the lower portions of the left and right end portions 80ba and 80bb, respectively, and exhaust ports 88a and 88b are provided at the upper portions, respectively. Furthermore, smooth circuit boards 84a and 84b are provided inside the electrical component box 80 at positions facing the flat surface. In the present embodiment, the heat sink 81 is disposed at the central portion 80bc of the back surface 80b of the electrical component box 80, so that heat sinks are disposed at both ends 80ba and 80bb of the back surface 80b of the electrical component box as in the past. Compared to the case, as shown by the thick arrows in FIG. 3, the air 89 a sucked from the through hole of the grill portion 51 on the front side of the outdoor unit 1 easily flows to the back surface 80 b of the electrical component box 80. Then, as shown in FIG. 6, the air that is sucked in from the suction port in the left-right direction of the electrical component box 80 and flows upward of 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 radiating fins 81a of the heat sink 81, air from the lower side to the upper side of the electrical component box 80 enters the electrical component box 80 from the lower intake ports 87a and 87b. In the center of the left and right end portions 80ba and 80bb of 80b, there is only air in the left-right direction toward the heat dissipating fins 81a of the heat sink 81, and there is no collision with air of different orientations. Is easy to flow up to the heat radiation fins 81a. Furthermore, 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. In addition, by arranging 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.

  Next, based on FIG. 9 and FIG. 11, each wire 201a-201d which connects each power supply terminal 122a, 122b and each inverter board | substrate 82a, 82b is demonstrated. Each of the wires 201a to 201d is composed of a copper wire whose surface is insulated and sealed. Hereinafter, the first wire 201a and the second wire 201b connected to the first power supply terminal 122a will be described, and the third wire 201c and the fourth wire 201d connected to the second power supply terminal 122b are the first wire. Since it is wired in the same manner as 201a and the second wire 201b, the description is omitted. The first wire 201a and the second wire 201b drawn from the first power supply terminal 122a are inserted through the opening 157 of the power supply terminal support plate 155. The first wire 201a and the second wire 201b inserted through the opening 157 are wired toward the back surface 80b side of the electrical component box 80, and after reaching the back side space, they are directed toward the upper surface 80e of the electrical component box 80. It is bent into a shape and wired along the back side of the substrate support plate 150. The first wire 201a and the second wire 201b are inserted into a first gap 158a formed between the substrate support plate 150 and the first support member 153a. The first wire 201a and the second wire 201b inserted into the first gap 158a are bent in a rounded shape toward the back surface 80b side of the electrical component box 80 and wired along the upper side of the first support member 153a. The first CT 154a and the second CT 154b are disposed on the same substrate 301a, and the substrate 301a is provided on the upper side of the first support member 153a. The first wire 201a is inserted through the through hole 311a of the first CT 154a, and the second wire 201b is inserted through the through hole 311b of the second CT 154b. The wires 201a and 202b inserted into the CTs 154a and 154b are respectively connected at right angles to terminals 321a and 321b at the lower end of the first compressor inverter board 82a. The third wire 201c and the fourth wire 201d connected to the second power supply terminal 122b are similarly wired and connected to the terminals 321c and 321d at the lower end of the second compressor inverter board 82b at right angles. .

  As described above, according to the present invention, the electrical component box 80 is formed in a multilayer structure, the board support plate 150 partitions the interior of the electrical component box 80 into a front side space and a back side space, and a compressor is provided in the back side space. Inverter boards 82a and 82b are arranged, power supply terminals 122a and 122b are arranged in the front space, and a current sensor for detecting current in the wire 201 connecting the inverter boards 82a and 82b for compressor and the power terminals 122a and 122b When the CTs 154a to 154d are provided, the wires 201a to 201d are attached to the compressor inverter boards 82a and 82b by mounting the CTs 154a to 154d on the board installed on the support member 153 that supports the board support plate 150. By connecting the wires 201a to 201d at right angles, the through holes 311a to 311 of the CT154 are connected. It is not necessary to bend for inserting and 1d in a round shape, a compressor inverter substrate 82a, 82b, can be reduced, thereby downsizing the electrical component box 80. Moreover, the direction of the through holes 311a to 311d of the CTs 154a to 154d is oriented in the front-rear direction that is perpendicular to the compressor inverter boards 82a and 82b, so that the wires 201a to 201d can be easily passed. Furthermore, CTs 154a to 154d need only be able to be inserted through the through holes 311a to 311d so that the through holes 311a to 311d through which the wires 201a to 201d are inserted can be seen from the front-rear direction. It suffices that the CTs 154a and 154b, 154c and 154d arranged on the same substrate are arranged so that a part of the surface on which the through holes 311a to 311d are formed is seen overlapping when viewed from the front-rear direction. Good. By arranging the CTs 154a to 154d so as to partially overlap when viewed from the front-rear direction of such an electrical component box 80, the interval between the terminals to which the wires 201a to 201d on the inverter board are connected is reduced. In addition, the compressor inverter boards 82a and 82b can be made small, and the space in the electrical component box 80 can be effectively utilized.

DESCRIPTION OF SYMBOLS 1 Outdoor unit of air conditioner 2 Case 3 Heat exchanger 4 Blower 50 Front pillar 51 Grill part 80 Electrical component box 81 Heat sink 82a, 82b Compressor inverter board 83a, 83b Fan motor inverter board 84a, 84b Smooth circuit board 111a, 111b Filter substrate 112 Main substrate 122a, 122b Power supply terminal 151 Substrate support metal plate 152 Substrate support resin plate 154a-154d CT
201a-201d wire

Claims (3)

Having a box-shaped housing,
A box-shaped electrical component box having a front surface and a back surface is accommodated in the housing.
In the outdoor unit of the air conditioner provided with a substrate support plate that divides the interior of the electrical component box into a front side and a back side of the electrical component box and forms a front side space and a back side space,
An inverter board is provided in the back side space,
A power supply terminal is provided in the front side space,
Between the power supply terminal and the inverter board, there is a step in the direction from the front to the back of the electrical component box,
The step is provided with a support member that connects between the substrate support plate and the back of the electrical component box,
A substrate on which a current sensor (CT) having a through hole for detecting current is attached to the support member is disposed,
An outdoor unit of an air conditioner, wherein a wire connecting the inverter board and the power supply terminal is inserted into a through hole of the current sensor.   The outdoor unit of an air conditioner according to claim 1, wherein the current sensor is arranged so that the through hole faces the front or the back of the electrical component box. Two current sensors are provided on the substrate;
The part of the surface of each of the current sensors facing the front surface or the back surface of the electrical component box appears to overlap when viewed from the front of the electrical component box. The outdoor unit of the air conditioner as described in 1 or 2.

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