JP2023141082A - Electric component box and outdoor unit of air conditioner - Google Patents

Abstract

To provide an electric component box and an outdoor unit of an air conditioner, capable of suppressing noise superposition.SOLUTION: An electric component box 321 stores: a filter substrate 531 arranged in an outdoor unit 1 and including an input terminal 534; a power terminal 73; an AC cable 72 connected to the power terminal 73 and the input terminal 534; and a main substrate 50. The electric component box is such that: there is provided a partition plate 360 for partitioning an internal space of the electric component box 321 into a back plate side space and a front side space; the power terminal 73, the main substrate 50 and the filter substrate 531 are arranged upward from the bottom in this order; the power terminal 73 and the filter substrate 531 are arranged on a back plate; the main substrate 50 is arranged in the partition plate 360; the AC cable 72 is connected to the power terminal 73 and the input terminal 534 passing through the back plate side space; and the AC cable 72 is electromagnetically shielded by a conductive member in a range of being arranged in the back plate side space.SELECTED DRAWING: Figure 6

Description

The present invention relates to an electrical component box that accommodates a board on which electronic components are mounted, and an outdoor unit of an air conditioner equipped with the electrical component box.

Patent Document 1 discloses an outdoor unit of an air conditioner that includes an electrical component box that accommodates a board on which electronic components are mounted. The electrical equipment box is connected to a power cable for supplying power from a commercial power source to the air conditioner, and houses a main board that controls the outdoor unit. Further, the electrical equipment box houses a filter board for removing noise flowing in from the commercial power source via the power cable and noise generated in the air conditioner flowing out to the outside. Also, an AC cable is connected to the power terminal and the filter board. Here, if radiated noise generated inside the outdoor unit or the like is superimposed on the AC cable, a problem arises in that the noise flows outside the outdoor unit and affects other devices. Therefore, it is desirable to keep the AC cable short.

Therefore, in the outdoor unit of the air conditioner disclosed in Patent Document 1, the power terminal to which the AC cable is connected is arranged at the lower end of the electrical component box, the filter board is arranged directly above the power terminal, and the power terminal and filter This allows the AC cable connected to the board to be shortened. The main board is arranged next to the filter board.

JP 2018-4230 Publication

However, if the space in the electrical component box is limited, it may be difficult to arrange the main board next to the filter board. Therefore, it is conceivable to arrange the main board above the filter board. In this case, connect the cable that supplies power from the main board to actuators such as electronic expansion valves and solenoid valves from the wiring outlet at the bottom of the electrical equipment box to the wiring terminals on the main board at the top of the electrical equipment box. The cable needs to be routed and becomes long. Therefore, if the main board is placed above the filter board, a problem arises in that noise generated by the cable that supplies power to the actuator is superimposed on the AC cable.

In view of the above problems, an object of the present invention is to provide an electrical component box and an outdoor unit of an air conditioner that can suppress noise superimposition.

One aspect of the present invention is a case that is arranged on the side side of an outdoor unit of an air conditioner, and includes a casing having a top surface, a bottom surface, and a side surface arranged between the top surface and the bottom surface, and a rear panel on the back side. It is a box-shaped box with an open front side, consisting of left and right side plates, an upper top plate, and a lower bottom plate, and is equipped with an input terminal, a filter board for removing power supply noise, and an external power supply. In an electrical equipment box that houses a power terminal to which a power cable is connected, an AC cable connected to the power terminal and an input terminal, and a main board that controls the equipment, the internal space of the electrical equipment box is A partition plate is provided that partially partitions a space on the back plate side and a space on the front side, and the power terminal, main board, and filter board are arranged in the order of the power terminal, main board, and filter board from bottom to top. In addition, the power terminal and filter board are placed on the back plate, the main board is placed on the partition plate in the space on the front side, and the AC cable is placed in the space on the back side between the partition plate and the back plate. The AC cable is electromagnetically shielded by a conductive member, at least in the range where the AC cable is connected to the power terminal and the input terminal through the AC cable and is disposed in the space on the back plate side between the partition plate and the back plate. It is an electrical equipment box.

Another aspect of the present invention is a case having a top surface, a bottom surface, a side surface disposed between the top surface and the bottom surface, a suction port provided on the side surface, and an air outlet provided with a blower fan on the top surface. an outdoor heat exchanger that is installed inside the casing and exchanges heat between the outside air sucked in from the suction port and the refrigerant, a compressor that sends the refrigerant to the outdoor heat exchanger, and a fan motor that drives the blower fan. The electrical component box according to one embodiment of the present invention is disposed on a side surface of a housing, and the main board is an outdoor unit of an air conditioner that controls at least a compressor and a fan motor.

According to the present invention, it is possible to provide an electrical component box and an outdoor unit of an air conditioner that can suppress noise superimposition.

1 is an external perspective view of an outdoor unit of an air conditioner according to a first embodiment. FIG. FIG. 2 is a perspective view showing a service panel separated from the casing of the outdoor unit of the air conditioner according to the first embodiment. FIG. 2 is a perspective view showing a state in which a service panel and an electrical component box are removed from the casing of the outdoor unit of the air conditioner according to the first embodiment. FIG. 2 is a front view showing an electrical component box in the outdoor unit of the air conditioner according to the first embodiment. FIG. 2 is a schematic diagram showing the structure of an electrical component box in the air conditioner according to the first embodiment. FIG. 3 is a layout diagram of an electronic board of an electrical component box in the outdoor unit of the air conditioner according to the first embodiment.

Below, the air conditioner according to this embodiment will be described in detail based on the drawings. Note that the present invention is not limited to this embodiment.

FIG. 1 is an external perspective view of an outdoor unit of an air conditioner according to this embodiment. FIG. 2 is a perspective view showing the service panel separated from the casing of the outdoor unit of the air conditioner of this embodiment.

First, with reference to FIGS. 1 to 4, an outdoor unit (hereinafter sometimes simply referred to as outdoor unit) 1 of an air conditioner according to the present embodiment includes a casing 10 in the shape of a rectangular parallelepiped. Since the outdoor unit 1 is of a top-blowing type, a blower room 20 is arranged in the upper part of the housing 10, and a machine room 30 is arranged in the lower part.

The blower room 20 is surrounded by a front panel 231, a left side panel 232, a right side panel 233, a back panel 234, and a top panel 235, and inside thereof are two propeller fan type blower fans 210a and 210b. are arranged side by side in the left and right direction. Further, the top panel 235 of the blower room 20 is provided with air outlets 236a, 236b and fan guards 220a, 220b for the blower fans 210a, 210b. In FIG. 4, when the housing 10 is viewed from the front, the space in the blower room 20 where the left blower fan 210a (the first blower fan) is arranged is the left blower room 20L, the space where the right blower fan 210b (the second blower fan) is arranged, The space in which the blower fan) is placed is called the right blower room 20R.

The machine room 30 is a space surrounded by a front surface, a left side surface, a right side surface, and a back surface (rear surface), of which the front surface 30a, right side surface 30b, and left side surface 30c are shown in FIGS. 1 and 2. Note that a bottom plate 301 serving as a base is arranged on the bottom surface of the machine room 30, and the top surface of the machine room 30 communicates with the blower room 20. In this embodiment, the front, left side, right side, and back side are the side surfaces arranged between the top panel 235 and the bottom plate 301, and outside air is supplied to the heat exchanger 36, which will be described later, from the left side to the back side of the machine room 30. A suction port 38a for guiding outside air is provided, and a suction port 38b for guiding outside air to a heat exchanger 36, which will be described later, is provided from the right side to the rear side of the machine room 30.

On the front surface 30a of the machine room 30, four service panels 311, 312, 313, and 314 are provided that are removed during maintenance. When there is no need to distinguish these service panels 311 to 314, they are collectively referred to as service panels 310.

The machine room 30 houses a compressor, a heat exchanger 36 as an outdoor heat exchanger, and the like. The heat exchanger 36 exchanges heat between the outside air sucked in through the suction ports 38a and 38b and the refrigerant flowing through the refrigerant flow path of the heat exchanger 36. Although not shown in detail, in this embodiment, the heat exchanger 36 extends from the left side 30c of the machine room 30 to the back and the center of the housing 10 in accordance with the arrangement of the first blower fan 210a and the second blower fan 210b. They are arranged in a substantially U-shape (C-shape) when viewed from above. This heat exchanger 36 has a symmetrical shape and is divided into two parts.

An electrical component box 320 is disposed in the upper part of the front surface 30a of the machine room 30, and FIG. 3 shows a state in which the electrical component box 320 is removed and the entire front surface 30a of the machine room 30 is exposed.

The outdoor unit 1 is a large outdoor unit used in a building multi-air conditioner (commercial multi-air conditioner) or the like. The outdoor unit 1 has a first compressor 351 and a second compressor 350 that send refrigerant to the heat exchanger 36 in a refrigerant circuit in which the outdoor unit 1 and an indoor unit (not shown) are connected to form a refrigeration cycle of an air conditioner. It is equipped with two compressors: compressor 352. In this embodiment, the compressor is not shown because it is housed in a compressor storage box (compressor box) 353.

Further, the electrical component box 320 is also large-sized and has a size spanning the entire width from the left end 30L to the right end 30R of the front 30a of the machine room 30. In this embodiment, as shown in FIG. 4, the electrical component box 320 consists of two electrical component boxes, a first electrical component box 321 on the left side and a second electrical component box 322 on the right side.

At the center of the front surface 30a of the machine room 30, a pillar 40 having a predetermined width and placed at the center is erected in order to increase the rigidity of the housing 10. The front 30a of the machine room 30 is divided into the left side and the right side by the support 40, and the first electrical component box 321 is arranged on the left side of the front 30a of the machine room 30 (between the left end 30L and the support 40). The product box 322 is arranged on the right side of the front surface 30a of the machine room 30 (between the right end portion 30R and the support column 40). The first electrical component box 321 and the second electrical component box 322 are placed apart from each other with the support 40 having a predetermined width in between, so that the influence of heat on each other is reduced.

Next, the first electrical component box 321 and the second electrical component box 322 will be explained. Regarding the first electrical component box 321 and the second electrical component box 322, in the paper of FIG. 4, the visible side (the front side in the machine room 30) is the front side, the back side (the back side in the machine room 30) is the back side, and the left side (The left side in the machine room 30) is the left side, the right side (the right side in the machine room 30) is the right side, the upper side (the top side in the blower room 20) is the upper side, and the lower side (the bottom side in the machine room 30) is the lower side. . Both the first electrical component box 321 and the second electrical component box 322 are box-shaped with the front side open. Electrical component box covers 322a are attached to the open openings on the front side of the electrical component box 322, respectively.

The electrical component box cover 321a and the electrical component box cover 322a are removable, and when these electrical component box covers 321a and 322a are removed, the insides of the first electrical component box 321 and the second electrical component box 322 are exposed. Note that the electrical component box cover 321a of the first electrical component box 321 is provided with a window portion 321b for inspecting the main board 50 inside. In this embodiment, the first electrical component box 321 and the second electrical component box 322 have parts with the same structure, so unless necessary, the first electrical component box 321 will be explained and the first electrical component box 322 will be explained. Description of the second electrical component box 322 regarding the portions having the same structure as the electrical component box 321 will be omitted. Also, since the electrical component box cover 321a and the electrical component box cover 322a have parts with the same structure, the electrical component box cover 321a will be explained except when necessary, and the parts with the same structure as the electrical component box cover 321a will be explained. A description of the electrical component box cover 322a will be omitted.

In this embodiment, as shown in FIGS. 1 and 2, the front surface 30a of the machine room 30 is virtually divided into four sides of 2 rows x 2 columns, and a service panel 310 is attached to each of the four sides. . The service panel 310 includes four panels: a first service panel 311, a second service panel 312, a third service panel 313, and a fourth service panel 314. Of these, two panels are the first service panel 311 and the second service panel 312. is a service panel that covers the front 30a side of the electrical equipment box.

The first service panel 311 and the second service panel 312 have the same external shape and size, and are arranged on the left and right so as to cover the first electrical component box 321 and the second electrical component box 322 from the front 30a side of the machine room 30. placed side by side. Note that the first service panel 311 is provided with a window 311a for inspecting the main board 50 inside the first electrical component box 321 located on the back side of the first service panel.

The third service panel 313 and the fourth service panel 314 are service panels that cover the front 30a side of the compressor 350 (first compressor 351, second compressor 352), etc. The third service panel 313 and the fourth service panel 314 also have the same external shape and size, and are arranged side by side to cover the first compressor 351 and the second compressor 352 from the front 30a side of the machine room 30. be done. By removing the third service panel 313 and the fourth service panel 314, the compressors 350 (first compressor 351, second compressor 352), etc. can be accessed.

That is, the front surface 30a of the machine room 30 is covered with four service panels: a first service panel 311 and a second service panel 312 for the electrical equipment box, and a third service panel 313 and a fourth service panel 314 for the machine room. It is being said. Each service panel 310 is screwed to the front 30a side of the machine room 30 at four locations, two locations on the left side and two locations on the right side.

In FIG. 3, the interior of the machine room 30 is exposed by removing the first to fourth four service panels 310 and the electrical component box 320 (first electrical component box 321, second electrical component box 322). The condition is shown. In the machine room 30, the windward side of the left blower room 20L is called a left machine room 300L, and the windward side of the right blower room 20R is called a right machine room 300R. Note that the windward side is the upstream side from which air flows when viewed from the blower room (blower fan), and the leeward side is the downstream side from which air is sent out from the blower room (blower fan).

The configuration of the electrical component box 320 will be described with reference to FIG. 5. Both the first electrical component box 321 and the second electrical component box 322 are formed of thin metal plates (sheet metal), and include a rear panel 323 on the back side, a side panel 324a on the left side, a side panel 324b on the right side, and It has a box shape with an open front side including a top plate 325 and a lower bottom plate 326, and is grounded by being connected to the earth via a ground wire (not shown). Two wiring openings 327 are provided on the bottom plate 326, and a cable connected to an external actuator such as an electronic expansion valve or a solenoid valve passes through the wiring opening 327 and is connected to a board disposed inside. Ru. Since the first electrical component box 321 is disposed on the left side and the second electrical component box 322 is disposed on the right side, the right side plate 324b of the first electrical component box 321 is on the second electrical component box 321 side, and the second electrical component box 322 is disposed on the right side. The left side plate 324a of the electrical component box 322 is arranged on the first electrical component box 321 side.

In the back plate 323 of the first electrical component box 321, a partition plate 360 is arranged near the right side plate 324b and near the bottom plate 326. The partition plate 360 is formed by pressing a thin metal plate, and includes a flat raised bottom plate piece 361 arranged at a distance from the back plate 323, and a raised bottom plate piece 361 erected from the left end side of the raised bottom plate piece 361 toward the back plate 323. A left side plate piece 362a that is joined to the back plate 323 by a raised bottom plate piece 361, and a right side plate piece 362b that is erected on the back plate 323 side from the right end side of the raised bottom plate piece 361 and joined to the back plate 323. The partition plate 360 divides a part of the internal space of the first electrical component box 321 into a space formed by the back plate 323 and the raised bottom plate piece 361 (back side space) and a space on the near side of the raised bottom plate piece 361 (front side space). ). Further, the upper end of the partition plate 360 has a metal upper plate piece 363 and an opening 365. The upper plate piece 363 is erected from the upper end side of the raised bottom plate piece 361 toward the rear plate 323 and is joined to the rear plate 323, and the opening 365 is arranged on the right side of the upper plate piece 363. Further, the lower end of the partition plate 360 has a metal lower plate piece 364 and an opening 365. The lower plate piece 364 is erected from the lower end side of the raised bottom plate piece 361 toward the rear plate 323 and is joined to the rear plate 323, and the opening 365 is arranged on the right side of the lower plate piece 364. It is joined to the left side plate piece 362a, the right side plate piece 362b, the upper plate piece 363 and the lower plate piece 364, and the back plate 323 by welding. However, it is not necessary to use welding, and as long as the partition plate 360 and the back plate 323 can be electrically connected, they may be joined by adhesive or other joining means.

The partition plate 360 is disposed on the back plate 323 of the first electrical component box 321, closer to the right side plate 324b, and the upper and lower openings 365 of the partition plate 360 are arranged in the upper and lower plate pieces 363 and 364, respectively. Since it is arranged on the right side, the upper and lower openings 365 of the first electrical component box 321 are arranged closer to the right side plate 324b. Note that a power terminal 73, which will be described later, is arranged in the first electrical component box 321, and a power terminal 73 is not arranged in the second electrical component box 322. The partition plate 360 is placed in the electrical equipment box where the power supply terminal 73 is placed. Therefore, the partition plate 360 is arranged in the first electrical component box 321, but the partition plate 360 is not arranged in the second electrical component box 322. Note that the second electrical component box 322 is provided with one wiring outlet 327.

Next, with reference to FIG. 6, the arrangement of components and boards in the electrical component box 320 will be described. FIG. 6 is a diagram of the electrical component box 320 viewed from the front side (the front side of the machine room 30), with the first electrical component box 321 on the left, the second electrical component box 322 on the right, and the first electrical component box A support 40 is shown between 321 and the second electrical component box 322, and electronic boards housed in the first electrical component box 321 and the second electrical component box 322 are schematically illustrated. As described above, the outdoor unit 1 according to the present embodiment includes two compressors (first compressor 351, second compressor 352) and two blower fans (first blower fan 210a, second blower fan 210a, second blower fan 210a, second blower fan 210a, second blower fan 210a). fan 210b). The first compressor 351 and the second compressor 352 are both variable speed compressors controlled by an inverter.

Therefore, as electrical components, two inverter boards for driving the compressor (first inverter board 511, second inverter board 512) and two fan driver boards for driving the blower fan (first fan driver board 521, a second fan driver board 522). Note that these fan driver boards are inverter boards for a fan motor (not shown) for driving the ventilation fan. It also includes two filter substrates (a first filter substrate 531 and a second filter substrate 532) and two reactors 533 for removing power supply noise. Furthermore, it is provided with a power terminal 73 to which a power cable connected to a main board 50 and an external power source, which will be described later, is connected. Here, power supply noise refers to noise generated in an air conditioner and flowing out to the outside, or noise flowing in from a commercial power source via a power cable.

The first electrical component box 321 accommodates a power terminal 73 to which a power cable is connected, a first filter board 531, a first inverter board 511, a main board 50, a reactor 533, and a first fan driver board 521. The second electrical component box 322 accommodates a second filter board 532, a second inverter board 512, a reactor 533, and a second fan driver board 522. In this embodiment, the main board 50, the power terminal 73, and the partition plate 360 are not provided in the second electrical component box 322.

In the first electrical component box 321, power from the external power supply is supplied to the first inverter board 511, the main board 50, the reactor 533, the first It is output to the fan driver board 521 and supplied to the first compressor 351, the first blower fan 210a, and actuators such as electronic expansion valves and electromagnetic valves (not shown).

In the second electrical component box 322, the power from the external power supply is transmitted to the second inverter board 512, the reactor 533, and the second It is output to the fan driver board 522 and supplied to the second compressor 352 and second blower fan 210b.

The first inverter board 511 is for the first compressor 351, the second inverter board 512 is for the second compressor 352, the first fan driver board 521 is for the first blower fan 210a, and the second fan driver board 522 is for the second This is for the blower fan 210b. The first inverter board 511 and the second inverter board 512 each include an input section 513 and a compressor drive section 514, and the compressor drive section 514 has an output section 515. Power is output from the output section 515 of the first inverter board 511 to the first compressor 351, and power is output from the output section 515 of the second inverter board 512 to the second compressor 352.

In this embodiment, on the first electrical component box 321 side, instructions such as the rotation speed are given to devices such as the first blower fan 210a, the second blower fan 210b, the first compressor 351, and the second compressor 352, and A main board 50 for controlling operation is provided. A microcomputer, a CPU (central processing unit), and the like are mounted on the main board 50.

On the back plate 323 of the first electrical component box 321, the power terminal 73 is disposed near the right side plate 324b and between the bottom plate 326 and the partition plate 360. Similarly, the first filter substrate 531 is disposed near the right side plate 324b and between the top plate 325 and the partition plate 360. Similarly, the first inverter board 511 is arranged near the bottom plate 326 and along the left side plate 324a. Similarly, the reactor 533 is arranged near the top plate 325 and along the left side plate 324a. Similarly, the first fan driver board 521 is disposed above the first inverter board 511 and between the reactor 533 and the first filter board 531. The main board 50 is arranged on the raised bottom plate piece 361 of the partition plate 360, and is arranged in a space on the front side of the raised bottom plate piece 361. When viewed from the front side of the first electrical component box 321 (the front side of the machine room 30), the power terminal 73, the main board 50, and the first filter board 531 are arranged from bottom to top. The substrate 50 and the first filter substrate 531 are arranged in this order.

The first filter board 531 includes an input terminal 534 arranged on the right side of the lower side and an output terminal 535 arranged on the left side, and the input terminal 534 is arranged on the right side of the center of the first filter board 531 in the left-right direction. There is. The wiring connections between the power terminal 73, first filter board 531, first inverter board 511, reactor 533, first fan driver board 521, and main board 50 arranged in the first electrical component box 321 are as follows. Become. First, the power terminal 73, the first filter board 531, and the second filter board 532 are connected. The AC cable 72 passes through the rear space formed by the raised bottom plate piece 361 of the partition plate 360 and the rear plate 323, and is connected to the input terminal 534 and the power terminal 73. Specifically, the AC cable 72 passes through the upper and lower openings 365 of the partition plate 360, through a space covered by the raised bottom plate piece 361, the left side plate piece 362a, and the right side plate piece 362b, and has one end connected to the power terminal. 73 and the other end is connected to an input terminal 534. Note that the AC cable 72 is also connected to an input terminal 534 of the second filter board 532 in the second electrical component box 322, as described later. Further, the output terminal 535 of the first filter board 531 and the input section 513 of the first inverter board 511 are connected by a cable, and the first inverter board 511, the reactor 533, and the first fan driver board 521 are connected by a cable. . Further, the output terminal 535 of the first filter board 531 and the AC section 51 of the main board 50 are connected via the first inverter board 511 by a cable. Further, the AC section 51 of the main board 50 and the second inverter board 512 of the second electrical component box 322 are connected by a cable.

In this way, the AC cable 72 is connected to the first filter board 531, and the cable is connected so that power is supplied to the first inverter board 511 and the main board 50 via the first filter board 531. Therefore, one AC cable 72 is connected to each of the two filter circuits corresponding to the first inverter board 511 and the main board 50, and power is supplied to the first inverter board 511 and the main board 50 via the respective filter circuits. Compared to the case where AC cables 72 are supplied, the length of the AC cable 72 can be reduced by one, thereby making it possible to suppress noise from being superimposed on the AC cable 72.

The first filter board 531 is arranged closer to the right side plate 324b, and the input terminal 534 is arranged to the right of the center in the left-right direction of the first filter board 531, so the input terminal 534 is arranged closer to the right side plate 324b. Placed. Since the power supply terminal 73 is arranged closer to the right side plate 324b, the AC cable 72 connected between the power supply terminal 73 and the input terminal 534 of the first filter board 531 can be shortened. Furthermore, since the input terminal 534 is arranged below the first filter board 531, the AC cable 72 can be further shortened. Therefore, superimposition of noise on the AC cable 72 can be suppressed.

The AC cable 72 is electromagnetically shielded by the partition plate 360 because it passes through a space covered by the metal raised bottom plate piece 361, the left side plate piece 362a, and the right side plate piece 362b. Moreover, the left side of the upper end and the left side of the lower end of the partition plate 360 are respectively covered by the metal upper plate piece 363 and the lower plate piece 364, so that they are further electromagnetically shielded. Therefore, superimposition of noise on the AC cable 72 can be suppressed.

Furthermore, since the main board 50 is disposed on the raised bottom plate piece 361 of the partition plate 360 which is disposed closer to the bottom plate 326 than the top plate 325 of the first electrical component box 321, the main board 50 is exposed to external electronic expansion. Cables connected to actuators such as valves and solenoid valves can be shortened inside the first electrical component box 321. Therefore, it is possible to suppress noise generated by the cable that supplies power to the actuator from being superimposed on the AC cable 72.

The main board 50 includes an AC section 51 through which an alternating current supplied from an external power source flows, a rectifier section 53 including a switching element that converts the alternating current supplied from the external power source into a direct current, and a rectifying section 53 that includes an alternating current supplied from the external power source. It includes a DC section 52 through which a direct current flows. The AC section 51 and the DC section 52 are arranged in the left-right direction so that the AC section 51 is on the right side and the DC section 52 is on the left side. is placed along the The rectifying section 53 is arranged above the AC section 51. When viewed from the front side of the first electrical component box 321 (the front side of the machine room 30), the AC cable 72 is disposed in the space between the partition plate 360 and the rear plate 323 on the rear plate side. It is located closer to the AC section 51 than the DC section 52 and at a position overlapping with the AC section 51 . Further, the AC section 51 is arranged along the right side plate 324b, and similarly, the AC cable 72 is arranged along the right side plate 324b. Further, the AC cable 72 is routed through the side plate 324b on the right side of the center of the first filter board 531 in the left-right direction. In the main board 50, the DC section 52 generates noise due to switching by the rectifying section 53, so the DC section 52 is a stronger source of noise than the AC section 51. Since it is arranged on the side, it is possible to suppress noise from being superimposed on the AC cable 72. Furthermore, since the AC cable 72 is arranged along the right side plate 324b of the first electrical component box 321, the AC cable 72 is placed away from the source of noise inside the first electrical component box 321. Therefore, superimposition of noise on the AC cable 72 can be suppressed.

In the first filter board 531, the input terminal 534 is arranged on the side of the AC part 51 arranged on the right side of the DC part 52 arranged on the left side of the main board 50 arranged below, and the output terminal 535 is arranged on the main board 50 side. It is arranged closer to the DC section 52, which is arranged on the left side, than the AC section 51, which is arranged on the right side of the board 50. As a result, even in the range where the AC cable 72 is above the upper end of the partition plate 360 and cannot be electromagnetically shielded by the partition plate 360, the AC cable 72 can be separated from the DC section 52, which is a source of strong noise. It is possible to suppress noise from being superimposed on the AC cable 72. Furthermore, the AC cable 72 can be connected straight from the power supply terminal 73 to the input terminal 534 of the first filter board 531. As a result, the length of the AC cable 72 can be shortened, noise can be further suppressed from being superimposed on the AC cable 72, and since the AC cable 72 is not bent, the connection of the AC cable 72 can be facilitated. I can do it. Furthermore, when viewed from the front side of the first electrical component box 321 (the front side of the machine room 30), the main board 50 is arranged below the first filter board 531, and the first inverter board is located on the left side of the main board 50. 511, the length of the cable connecting the output terminal 535 of the first filter board 531 and the first inverter board 511 can be shortened.

Further, the main board 50 includes a display section 54 and an input section 55. The electrical component box cover 321a is provided with a window 321b for inspecting the main board 50 inside. The window portion 321b is arranged at a position facing the display portion 54 and the input portion 55 provided on the main board 50 with the electrical component box cover 321a attached to the first electrical component box 321. Therefore, with the electrical component box cover 321a attached to the first electrical component box 321, the display section 54 and the input section 55 can be easily viewed and operated through the window section 321b. Note that the window portion 321b does not necessarily have to be placed at a position facing the display portion 54 and the input portion 55, as long as the display portion 54 and the input portion 55 can be viewed and operated through the window portion 321b. good.

Further, the first service panel 311 is provided with a window 311a for inspecting the main board 50 inside the first electrical component box 321. The window portion 311a is arranged at a position opposite to the window portion 321b provided in the electrical component box cover 321a with the first service panel 311 attached to the front face 30a of the machine room 30. Therefore, when the first service panel 311 is attached to the front surface 30a of the machine room 30 and the electrical component box cover 321a is attached to the first electrical component box 321, input to the display section 54 is made through the window section 311a and the window section 321b. It is easy to visually recognize and operate the section 55. Note that the window portion 311a does not necessarily have to be placed at a position opposite to the window portion 321b, as long as the display portion 54 and the input portion 55 can be viewed and operated through the window portion 311a and the window portion 321b. good.

The second electrical component box 322 does not house the partition plate 360, power supply terminal 73, and main board 50 that were arranged in the first electrical component box 321, but includes the second filter board 532, second inverter board 512, A reactor 533 and a second fan driver board 522 are accommodated.

On the back plate 323 of the second electrical component box 322, the second filter board 532 is closer to the top plate 325 and is arranged along the left side plate 324a. Similarly, the second inverter board 512 is closer to the bottom plate 326 and is arranged along the right side plate 324b. Similarly, the second fan driver board 522 is arranged near the right side plate 324b and the top plate 325. Similarly, the reactor 533 is disposed near the top plate 325 and between the second filter board 532 and the second fan driver board 522. The second filter board 532 includes an input terminal 534 arranged on the left side of the upper side and an output terminal 535 arranged on the right side, and the input terminal 534 is arranged to the left of the center of the second filter board 532 in the left-right direction. .

Wiring connections among the second filter board 532, second inverter board 512, reactor 533, and second fan driver board 522 arranged in the second electrical component box 322 are as follows. First, the AC cable 72 housed in the first electrical component box 321 and connected to the power supply terminal 73 is connected to the input terminal 534 of the second filter board 532, and power is supplied to the second filter board 532. Further, the output terminal 535 of the second filter board 532 and the input section 513 of the second inverter board 512 are connected by a cable, and the second inverter board 512, the reactor 533, and the second fan driver board 522 are connected by a cable. Further, the AC section 51 of the main board 50 housed in the first electrical component box 321 and the second inverter board 512 are connected.

The second filter board 532 is placed closer to the left side plate 324a, and the input terminal 534 is placed to the left of the left-right center of the second filter board 532, so the input terminal 534 is placed closer to the left side plate 324a. Placed. Since the power terminal 73 is arranged near the right side plate 324b of the first electrical component box 321, the AC cable 72 connected between the power terminal 73 and the input terminal 534 of the second filter board 532 can be shortened. can. In other words, the AC cable 72 connected to the power terminal 73 and the first filter board 531 and the AC cable 72 connected to the power terminal 73 and the second filter board 532 are shortened. I can do it. Therefore, superimposition of noise on the AC cable 72 can be suppressed.

In this embodiment, the first electrical component box 321 and the second electrical component box 322 are formed of thin metal plates, but they do not need to be made of metal as long as they are made of conductive material. It may be made of resin containing carbon. This is because if the material is conductive, the AC cable 72 can be electromagnetically shielded.

Furthermore, in this embodiment, the partition plate 360 is formed of a thin metal plate, but it does not need to be made of metal as long as it is made of a conductive material, and may be made of resin containing carbon. I don't mind. This is because if the material is conductive, the AC cable 72 can be electromagnetically shielded.

Furthermore, in this embodiment, the AC cable 72 is electromagnetically shielded by the partition plate 360 because it passes through a space covered by the metal raised bottom plate piece 361, the left side plate piece 362a, and the right side plate piece 362b. However, the raised bottom plate piece 361, the left side plate piece 362a, and the right side plate piece 362b do not need to be made of metal or conductive material. For example, the AC cable 72 passing through a space covered by the raised bottom plate piece 361, the left side plate piece 362a, and the right side plate piece 362b, which are not made of conductive material, is connected to the back plate between the partition plate 360 and the back plate 323. This is because if the AC cable itself is covered with a conductive covering member in the range disposed in the side space, it will be electromagnetically shielded. Furthermore, even if the partition plate 360 is made of a non-conductive material, the main board 50 can be placed on the raised bottom plate piece 361 of the partition plate 360, so that external actuators such as electronic expansion valves and solenoid valves can be connected from the main board 50. The cable connected to can be shortened inside the first electrical component box 321. Therefore, it is possible to suppress noise generated by the cable that supplies power to the actuator from being superimposed on the AC cable 72.

Further, in the present embodiment, the left side of the upper end and the left side of the lower end of the partition plate 360 are respectively closed by an upper plate piece 363 and a lower plate piece 364 made of metal. It is not necessary that the upper plate piece 363 and the lower plate piece 364 made of the same material are closed. However, it is preferable that the upper plate piece 363 and the lower plate piece 364 are closed. This is because the AC cable 72 can be further electromagnetically shielded.

Although the embodiments have been described above with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art.

DESCRIPTION OF SYMBOLS 1... Outdoor unit, 10... Housing, 38a, b... Suction port, 50... Main board, 51... AC section, 52... DC section, 53... Rectifier section, 54... Display section, 55... Input section, 72... AC Cable, 73... Power supply terminal, 236a, b... Air outlet, 321... First electrical component box, 321a... Electrical component box cover, 321b... Window section, 322... Second electrical component box, 322a... Electrical component box cover, 323 ...Back plate, 324a, b...Side plate, 325...Top plate, 326...Bottom plate, 327...Wiring outlet, 360...Partition plate, 361...Rise bottom plate piece, 362a, b...Side plate piece, 363...Top plate piece , 364... Lower plate piece, 365... Opening, 511... First inverter board, 512... Second inverter board, 513... Input section, 514... Compressor drive section, 515... Output section, 521... First fan driver board, 522... Second fan driver board, 531... First filter board, 532... Second filter board, 533... Reactor, 534... Input terminal, 535... Output terminal

Claims (10)

In an outdoor unit of an air conditioner, the casing has a top surface, a bottom surface, and side surfaces arranged between the top surface and the bottom surface, and is arranged on the side surface side, and includes a back panel on the back side and left and right side panels. It has a box shape with an open front side and a top plate on the upper side and a bottom plate on the lower side,
A filter board equipped with an input terminal and for removing power supply noise,
a power terminal to which a power cable connected to an external power source is connected;
an AC cable connected to the power supply terminal and the input terminal;
In the electrical equipment box that houses the main board that controls the equipment,
comprising a partition plate that partitions a part of the internal space of the electrical component box into a back plate side space and a front side space,
The power terminal, the main board, and the filter board are arranged in the order of the power terminal, the main board, and the filter board from bottom to top, and the power terminal and the filter board are arranged on the rear board. , the main board is arranged on the partition plate and is arranged in the front side space,
The AC cable is connected to the power terminal and the input terminal through the space on the back plate side between the partition plate and the back plate,
The electrical component box is characterized in that the AC cable is electromagnetically shielded by a conductive member at least in a range disposed in the rear plate side space between the partition plate and the rear plate. . The partition plate is a conductive plate, and includes a flat raised bottom plate piece disposed at a distance from the back plate, and a raised bottom plate piece erected from both left and right ends of the raised bottom plate piece toward the back plate side. It is provided with a side plate piece that is joined to the back plate and has openings at the top and bottom,
The AC cable is connected to the power terminal and the input terminal through a space covered by the raised bottom plate piece and the left and right side plate pieces of the partition plate,
The electrical component box according to claim 1, wherein the AC cable is electromagnetically shielded by the conductive partition plate. 3. The electrical component box according to claim 1, wherein the main board is supplied with power through the filter board. The main board includes an AC section through which an alternating current supplied from an external power supply flows, a rectifier section including a switching element that converts the alternating current into a direct current, and a DC section through which the direct current flows, and the AC section and the The DC section is separated from the left and right,
Claims 1 to 3, wherein the AC cable is disposed closer to the AC section than the DC section within a range where the AC cable is disposed in the space on the back plate side between the partition plate and the back plate. The electrical component box described in any one of the following. The filter board includes an output terminal,
The input terminal is arranged closer to the AC section than the DC section of the main board in the left-right direction,
The electrical component box according to claim 4, wherein the output terminal is arranged closer to the DC section than the AC section of the main board. The electrical component box according to claim 4 or 5, wherein the AC section is arranged along the side plate in the left-right direction. 7. The electrical component box according to claim 2, wherein at least one of the upper and lower openings of the partition plate is partially covered with a conductive member. The electrical component box includes an electrical component box cover that covers an open opening of the electrical component box,
The electrical component box cover includes a window portion through which a part of the electrical component box cover can be opened;
The main board includes a display section and an input section,
The window section is arranged to face the display section and the input section,
The electrical component box according to any one of claims 1 to 7, wherein the display section and the input section are visible through the window section. The electrical component box according to any one of claims 1 to 8, wherein the input terminal is arranged below the filter board. A casing having a top surface, a bottom surface, a side surface disposed between the top surface and the bottom surface, an inlet provided on the side surface, and an outlet provided with a blower fan on the top surface;
an outdoor heat exchanger that is provided inside the housing and exchanges heat between the outside air sucked in from the suction port and a refrigerant; a compressor that sends refrigerant to the outdoor heat exchanger; and a fan motor that drives the blower fan. and
The electrical component box according to any one of claims 1 to 9 is arranged on the side surface of the housing,
The outdoor unit of an air conditioner, wherein the main board controls at least the compressor and the fan motor.

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