Electrical equipment boxes and outdoor units of air conditioners

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

[Technical Field]

[0001] The present invention relates to an electrical component box that houses a board on which electronic components are mounted, and an outdoor unit for an air conditioner that includes the electrical component box. [Background technology]

[0002] Patent Document 1 discloses an outdoor unit of an air conditioner equipped with an electrical component box that houses a circuit board on which electronic components are mounted. A power cable for supplying power from a commercial power source to the air conditioner is connected to the electrical component box, and the electrical component box houses a main circuit board that controls the outdoor unit. The electrical component box also houses a filter board that removes noise that flows in from the commercial power source via the power cable and removes noise generated in the air conditioner that leaks out. An AC cable is connected to the power terminal and the filter board. If radiated noise generated inside the outdoor unit, etc., is superimposed on the AC cable, the noise will leak out of the outdoor unit, causing problems and affecting other devices. Therefore, it is desirable to keep the AC cable short.

[0003] 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 located at the bottom of the electrical component box, and the filter board is located directly above the power terminal, allowing the AC cable connecting the power terminal and filter board to be short.The main board is then located next to the filter board. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-4230 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when space in the electrical equipment box is limited, it may be difficult to place the main board next to the filter board. Therefore, it is also possible to place the main board above the filter board. In this case, the cable that supplies power from the main board to actuators such as electronic expansion valves and solenoid valves must be routed from the wiring outlet at the bottom of the electrical equipment box to the wiring terminal on the main board at the top of the electrical equipment box, which results in a long cable. Therefore, if the main board is placed above the filter board, there is a problem of noise emitted by the cable that supplies power to the actuators being superimposed on the AC cable.

[0006] In view of the above-mentioned 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 superposition. [Means for solving the problem]

[0007] One aspect of the present invention is an electrical equipment box that is arranged on the side of an outdoor unit of an air conditioner, the electrical equipment box having a housing with a top surface, a bottom surface, and a side surface disposed between the top surface and the bottom surface, and that is box-shaped with a rear panel on the back side, left and right side panels, an upper top panel, and a lower bottom panel, and is open on the front side, and that has an input terminal and houses a filter board for removing power supply noise, a power terminal to which a power cable connected to an external power supply is connected, an AC cable connected to the power terminal and the input terminal, and a main board for controlling the equipment, and that divides part of the internal space of the electrical equipment box into a rear panel side space and a front side space. The electrical equipment box has a partition plate separating the electrical components, and the power supply terminal, main board, and filter board are arranged from bottom to top in the order of power supply terminal, main board, and filter board, with the power supply terminal and filter board arranged on the rear panel, and the main board arranged on the partition plate and arranged in the front space, and the AC cable passes through the rear panel side space between the partition plate and the rear panel and is connected to the power supply terminal and the input terminal, and the AC cable is electromagnetically shielded by a conductive member at least in the range where it is arranged in the rear panel side space between the partition plate and the rear panel.

[0008] Another aspect of the present invention is an outdoor unit of an air conditioner comprising a housing having a top surface, a bottom surface, and sides disposed between the top and bottom surfaces, an intake port provided on the side surface, and an outlet port provided on the top surface with a blower fan, an outdoor heat exchanger provided inside the housing for exchanging heat between outside air drawn in through the intake port and a refrigerant, a compressor for sending refrigerant to the outdoor heat exchanger, and a fan motor for driving the blower fan, wherein an electrical equipment box according to one aspect of the present invention is disposed on the side surface of the housing, and a main board controls at least the compressor and the fan motor. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide an electrical component box and an outdoor unit of an air conditioner that are capable of suppressing noise superposition. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an external perspective view of an outdoor unit of an air conditioner according to a first embodiment. FIG. [Figure 2] FIG. 2 is a perspective view showing the service panel separated from the housing of the outdoor unit of the air conditioner according to the first embodiment. [Figure 3] 1 is a perspective view showing a state in which a service panel and an electrical component box have been removed from the housing of an outdoor unit of an air conditioner according to a first embodiment. FIG. [Figure 4] 1 is a front view showing an electrical component box in an outdoor unit of an air conditioner according to a first embodiment. FIG. [Figure 5] 2 is a schematic diagram showing the structure of an electrical component box in the air conditioner according to the first embodiment. FIG. [Figure 6] FIG. 3 is a layout diagram of electronic boards in an electrical component box in the outdoor unit of the air conditioner according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] An air conditioner according to this embodiment will be described in detail below with reference to the drawings, although the present invention is not limited to this embodiment.

[0012] Fig. 1 is a perspective view of the exterior of the outdoor unit of the air conditioner of the present embodiment, and Fig. 2 is a perspective view showing the service panel separated from the housing of the outdoor unit of the air conditioner of the present embodiment. [Example]

[0013] 1 to 4, an outdoor unit 1 of an air conditioner according to this embodiment (hereinafter sometimes simply referred to as the outdoor unit) includes a rectangular parallelepiped housing 10. As the outdoor unit 1 is an upward-blowing type, a blower chamber 20 is disposed above the housing 10, and a machine chamber 30 is disposed below the blower chamber 20.

[0014] The blower chamber 20 is surrounded by a front panel 231, a left side panel 232, a right side panel 233, a rear panel 234, and a top panel 235, and two propeller-type blower fans 210a and 210b are arranged side by side in the left-right direction inside the blower chamber 20. The top panel 235 of the blower chamber 20 is provided with air outlets 236a and 236b and fan guards 220a and 220b for the blower fans 210a and 210b. In FIG. 4, when viewing the housing 10 from the front, the space in the blower chamber 20 where the left blower fan 210a (first blower fan) is arranged is referred to as the left blower chamber 20L, and the space where the right blower fan 210b (second blower fan) is arranged is referred to as the right blower chamber 20R.

[0015] Machine room 30 is a space surrounded by a front, left side, right side, and back (rear), of which front side 30a, right side 30b, and left side 30c are shown in Figures 1 and 2. A base plate 301 is disposed on the bottom surface of machine room 30, and the top surface of machine room 30 is connected to blower room 20. In this embodiment, the front, left side, right side, and back are side surfaces disposed between top panel 235 and bottom plate 301, and an intake port 38a is provided from the left side to the back of machine room 30 for guiding outside air to heat exchanger 36, which will be described later, and an intake port 38b is provided from the right side to the back of machine room 30 for guiding outside air to heat exchanger 36, which will be described later.

[0016] Four service panels 311, 312, 313, and 314 that can be removed for maintenance are provided on the front surface 30a of the machine room 30. When it is not necessary to distinguish between these service panels 311 to 314, they will be collectively referred to as service panels 310.

[0017] The machine room 30 accommodates a compressor, a heat exchanger 36 serving as an outdoor heat exchanger, and the like. The heat exchanger 36 exchanges heat between outside air drawn in through the intake 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 is arranged in a substantially U-shape in plan view, extending from the left side surface 30c of the machine room 30 to the back surface and the center of the housing 10, in accordance with the arrangement of the first blower fan 210a and the second blower fan 210b. The heat exchanger 36 is divided into two halves having a symmetrical shape.

[0018] An electrical equipment box 320 is disposed at the top of the front face 30a of the machine room 30, and FIG. 3 shows the state in which the electrical equipment box 320 has been removed, exposing the entire front face 30a of the machine room 30.

[0019] This outdoor unit 1 is a large outdoor unit used in a multi-air conditioner for buildings (commercial multi-air conditioner), etc. The outdoor unit 1 is connected to an indoor unit (not shown) and is provided with two compressors, a first compressor 351 and a second compressor 352, as compressors 350 that send refrigerant to a heat exchanger 36 in a refrigerant circuit that forms the refrigeration cycle of the air conditioner. In this embodiment, the compressors are housed in a compressor housing box (compressor box) 353 and are therefore not shown.

[0020] The electrical component box 320 is also large, spanning the entire width from the left end 30L to the right end 30R of the front surface 30a of the machine room 30. In this embodiment, as shown in Fig. 4, the electrical component box 320 consists of two boxes: a first electrical component box 321 on the left side and a second electrical component box 322 on the right side.

[0021] A centrally located support pillar 40 having a predetermined width is erected in the center of the front face 30a of the machine room 30 to increase the rigidity of the housing 10. The support pillar 40 divides the front face 30a of the machine room 30 into left and right sides, with the first electrical component box 321 being located on the left side of the front face 30a of the machine room 30 (between the left end 30L and the support pillar 40) and the second electrical component box 322 being located on the right side of the front face 30a of the machine room 30 (between the right end 30R and the support pillar 40). The first electrical component box 321 and the second electrical component box 322 are located apart across the support pillar 40 having a predetermined width, reducing the thermal influence they have on each other.

[0022] Next, the first electrical component box 321 and the second electrical component box 322 will be described. In the first electrical component box 321 and the second electrical component box 322, the visible side (the front side of the machine room 30) will be referred to as the front side, the back side (the rear side of the machine room 30) as the back side, the left side (the left side of the machine room 30) as the left side, the right side (the right side of the machine room 30) as the right side, the upper side (the top side of the blower room 20) as the upper side, and the lower side (the bottom side of the machine room 30) as the lower side. The first electrical component box 321 and the second electrical component box 322 are both box-shaped with an open front side, and an electrical component box cover 321a is attached to the open opening on the front side of the first electrical component box 321, and an electrical component box cover 322a is attached to the open opening on the front side of the second electrical component box 322.

[0023] Electrical component box cover 321a and electrical component box cover 322a are detachable, and removing electrical component box covers 321a and 322a exposes the interiors of first electrical component box 321 and second electrical component box 322. Electrical component box cover 321a of first electrical component box 321 is provided with window 321b for inspecting main board 50 therein. In this embodiment, first electrical component box 321 and second electrical component box 322 have parts that have the same structure, and therefore, except where necessary, only first electrical component box 321 will be described, and a description of parts of second electrical component box 322 that have the same structure as first electrical component box 321 will be omitted. Furthermore, since electrical equipment box cover 321a and electrical equipment box cover 322a have parts with the same structure, we will only explain electrical equipment box cover 321a unless necessary, and will omit explanations of electrical equipment box cover 322a regarding the parts with the same structure as electrical equipment box cover 321a.

[0024] 1 and 2, in this embodiment, the front face 30a of the machine room 30 is virtually divided into four faces in a 2-row by 2-column arrangement, and each face is fitted with a service panel 310. The service panels 310 are a first service panel 311, a second service panel 312, a third service panel 313, and a fourth service panel 314, of which the first service panel 311 and the second service panel 312 are service panels that cover the front face 30a side of the electrical equipment box.

[0025] The first service panel 311 and the second service panel 312 have the same external shape and size, and are arranged side by side 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 face 30a side of the machine room 30. 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 at the back side of the first service panel.

[0026] 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 on the left and right so as to cover the first compressor 351 and the second compressor 352 from the front 30a side of the machine room 30. By removing the third service panel 313 and the fourth service panel 314, the compressor 350 (first compressor 351, second compressor 352), etc. can be accessed.

[0027] That is, the front face 30a of the machinery room 30 is covered with four service panels: a first service panel 311 for the electrical equipment box, a second service panel 312, and a third service panel 313 and a fourth service panel 314 for the machinery room. Each service panel 310 is screwed to the front face 30a of the machinery room 30 at four locations: two on the left side and two on the right side.

[0028] 3 shows the state in which the inside of the machine room 30 is exposed by removing the first through fourth service panels 310 and the electrical component boxes 320 (first electrical component box 321, second electrical component box 322). Within the machine room 30, the upwind side of the left blower chamber 20L is referred to as the left machine room 300L, and the upwind side of the right blower chamber 20R is referred to as the right machine room 300R. The upwind side is the upstream side from which air flows as viewed from the blower chamber (blower fan), and the downwind side is the downstream side from which air is sent out from the blower chamber (blower fan).

[0029] The configuration of electrical component box 320 will be described with reference to Figure 5. First electrical component box 321 and second electrical component box 322 are both formed from thin metal plates (sheet metal), and are box-shaped with an open front, including rear panel 323 at the back, side panel 324a at the left, side panel 324b at the right, upper panel 325, and lower panel 326. They are grounded by being connected to the earth via a ground wire (not shown). Two wiring outlets 327 are provided on bottom panel 326, and cables connected to external actuators such as electronic expansion valves and solenoid valves pass through wiring outlets 327 and are connected to circuit boards arranged inside. Since the first electrical equipment box 321 is positioned on the left side and the second electrical equipment box 322 is positioned on the right side, the right side panel 324b of the first electrical equipment box 321 is on the second electrical equipment box 321 side, and the left side panel 324a of the second electrical equipment box 322 is positioned on the first electrical equipment box 321 side.

[0030] A partition plate 360 ​​is arranged on the back panel 323 of the first electrical component box 321, near the right side panel 324b and near the bottom panel 326. The partition plate 360 ​​is formed by pressing a thin metal plate, and includes a flat raised bottom panel piece 361 arranged at a distance from the back panel 323, a left side panel piece 362a standing from the left end edge of the raised bottom panel piece 361 towards the back panel 323 and joined to the back panel 323, and a right side panel piece 362b standing from the right end edge of the raised bottom panel piece 361 towards the back panel 323 and joined to the back panel 323. The partition plate 360 ​​divides part of the internal space of the first electrical component box 321 into a space formed by the back panel 323 and the raised bottom panel piece 361 (a rear-side space) and a space on the front side of the raised bottom panel piece 361 (a front-side space). The upper end of the partition plate 360 ​​has a metal upper plate piece 363 and an opening 365. The upper plate piece 363 extends from the upper end edge of the raised bottom plate piece 361 toward the rear plate 323 and is joined to the rear plate 323, with the opening 365 located to the right of the upper plate piece 363. The lower end of the partition plate 360 ​​has a metal lower plate piece 364 and an opening 365. The lower plate piece 364 extends from the lower end edge of the raised bottom plate piece 361 toward the rear plate 323 and is joined to the rear plate 323, with the opening 365 located to the right of the lower plate piece 364. The left side plate piece 362a, the right side plate piece 362b, the upper plate piece 363, and the lower plate piece 364 are joined to the rear plate 323 by welding. However, welding is not necessary; they may be joined by adhesive or other joining means as long as electrical continuity between the partition plate 360 ​​and the rear plate 323 is ensured.

[0031] 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. Furthermore, the upper and lower openings 365 of the partition plate 360 ​​are disposed on the right side of the upper plate piece 363 and the lower plate piece 364, respectively. Therefore, in the first electrical component box 321, the upper and lower openings 365 are disposed closer to the right side plate 324b. A power supply terminal 73, which will be described later, is disposed in the first electrical component box 321, but the power supply terminal 73 is not disposed in the second electrical component box 322. The partition plate 360 ​​is disposed in the electrical component box where the power supply terminal 73 is disposed. Therefore, the partition plate 360 ​​is disposed in the first electrical component box 321, but the partition plate 360 ​​is not disposed in the second electrical component box 322. The second electrical component box 322 is provided with one wiring outlet 327.

[0032] Next, the arrangement of components and circuit boards in the electrical component box 320 will be described with reference to Fig. 6. Fig. 6 is a view of the electrical component box 320 as seen from the front side (the front side of the machine chamber 30), with the first electrical component box 321 on the left and the second electrical component box 322 on the right, with support posts 40 shown between the first electrical component box 321 and the second electrical component box 322, and schematically shows the electronic circuit boards housed in the first electrical component box 321 and the second electrical component box 322. As described above, the outdoor unit 1 according to this embodiment is equipped with two compressors (first compressor 351 and second compressor 352) and two blower fans (first blower fan 210a and second blower fan 210b). Both the first compressor 351 and the second compressor 352 are variable speed compressors controlled by inverters.

[0033] Therefore, the air conditioner is equipped with, as electrical components, two inverter boards for driving the compressors (first inverter board 511, second inverter board 512) and two fan driver boards for driving the blower fans (first fan driver board 521, second fan driver board 522). These fan driver boards are inverter boards for fan motors (not shown) that drive the blower fans. The air conditioner is also equipped with two filter boards (first filter board 531, second filter board 532) and two reactors 533 for removing power supply noise. Furthermore, the air conditioner is equipped with a power supply terminal 73 to which a power cable connected to a main board 50 (described later) and an external power supply is connected. Here, power supply noise refers to noise generated in the air conditioner and leaking out, and noise that flows in from a commercial power supply via the power cable.

[0034] The first electrical component box 321 houses a power supply 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 houses a second filter board 532, a second inverter board 512, a reactor 533, and a second fan driver board 522. In this embodiment, the second electrical component box 322 does not include the main board 50, the power supply terminal 73, or the partition plate 360.

[0035] In the first electrical equipment box 321, power from an external power source is output to the power terminal 73 to which the power cable is connected, and to the first inverter board 511, main board 50, reactor 533, and first fan driver board 521 via the first filter board 531, and is then supplied to the first compressor 351, the first blower fan 210a, and actuators such as electronic expansion valves and solenoid valves (not shown).

[0036] In the second electrical equipment box 322, power from an external power source is output to the power terminal 73 housed in the first electrical equipment box 321 and via the second filter board 532 to the second inverter board 512, the reactor 533, and the second fan driver board 522, and is then supplied to the second compressor 352 and the second blower fan 210b.

[0037] 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 blower fan 210b. The first inverter board 511 and the second inverter board 512 each have an input unit 513 and a compressor drive unit 514, and the compressor drive unit 514 has an output unit 515. Power is output from the output unit 515 of the first inverter board 511 to the first compressor 351, and power is output from the output unit 515 of the second inverter board 512 to the second compressor 352.

[0038] In this embodiment, a main board 50 is provided on the first electrical component box 321 side to control operation by issuing instructions such as rotation speed to devices such as the first blower fan 210a, the second blower fan 210b, the first compressor 351, and the second compressor 352. A microcomputer, a CPU (Central Processing Unit), etc. are mounted on the main board 50.

[0039] On the back panel 323 of the first electrical component box 321, the power terminal 73 is disposed between the bottom panel 326 and the partition panel 360, near the right side panel 324b. Similarly, the first filter board 531 is disposed between the top panel 325 and the partition panel 360, near the right side panel 324b. Similarly, the first inverter board 511 is disposed along the left side panel 324a, near the bottom panel 326. Similarly, the reactor 533 is disposed along the left side panel 324a, near the top panel 325. Similarly, the first fan driver board 521 is disposed above the first inverter board 511, between the reactor 533 and the first filter board 531. The main board 50 is disposed on the raised bottom panel piece 361 of the partition panel 360, and is disposed in the space in front of the raised bottom panel piece 361. When viewed from the front side of the first electrical equipment box 321 (the front side of the machine room 30), the power terminal 73, main board 50, and first filter board 531 are arranged from bottom to top in the following order: power terminal 73, main board 50, first filter board 531.

[0040] The first filter board 531 has an input terminal 534 located on the lower right side and an output terminal 535 located on the left side, with the input terminal 534 located to the right of the center in the left-right direction of the first filter board 531. The power supply terminal 73, which is located in the first electrical component box 321, the first filter board 531, the first inverter board 511, the reactor 533, the first fan driver board 521, and the main board 50 are respectively wired as follows: First, the power supply terminal 73 is connected to the first filter board 531 and the second filter board 532. The AC cable 72 passes through the rear-side space formed by the raised bottom plate piece 361 of the partition board 360 and the rear plate 323, and is connected to the input terminal 534 and the power supply 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 is connected at one end to the power terminal 73 and at the other end to the input terminal 534. As will be described later, the AC cable 72 is also connected to the input terminal 534 of the second filter board 532 in the second electrical component box 322. An output terminal 535 of the first filter board 531 is connected to the input section 513 of the first inverter board 511 by a cable, and the first inverter board 511 is connected to the reactor 533 and the first fan driver board 521 by a cable. The output terminal 535 of the first filter board 531 is connected to the AC section 51 of the main board 50 by a cable via the first inverter board 511. Furthermore, 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.

[0041] In this way, AC cable 72 is connected to first filter board 531, and the cable is connected so that power is supplied to first inverter board 511 and main board 50 via first filter board 531. Therefore, compared to connecting one AC cable 72 to each of two filter circuits corresponding to first inverter board 511 and main board 50, and supplying power to first inverter board 511 and main board 50 via the respective filter circuits, the number of AC cables 72 can be reduced by one, and noise superposition on AC cable 72 can be suppressed.

[0042] Since the first filter substrate 531 is disposed closer to the right side panel 324b and the input terminal 534 is disposed to the right of the center in the left-right direction of the first filter substrate 531, the input terminal 534 is disposed closer to the right side panel 324b. Since the power supply terminal 73 is disposed closer to the right side panel 324b, the AC cable 72 connected to the power supply terminal 73 and the input terminal 534 of the first filter substrate 531 can be shortened. Furthermore, since the input terminal 534 is disposed below the first filter substrate 531, the AC cable 72 can be further shortened. Therefore, it is possible to suppress noise from being superimposed on the AC cable 72.

[0043] Because AC cable 72 passes through a space covered by metal raised bottom plate piece 361, left side plate piece 362a, and right side plate piece 362b, it is electromagnetically shielded by partition plate 360. In addition, the left side of the upper end and the left side of the lower end of partition plate 360 ​​are closed by metal upper plate piece 363 and lower plate piece 364, respectively, providing further electromagnetic shielding. This makes it possible to suppress noise superimposition on AC cable 72.

[0044] Furthermore, because main board 50 is disposed on raised bottom plate piece 361 of partition plate 360, which is positioned closer to bottom plate 326 than to top plate 325 of first electrical component box 321, cables connecting main board 50 to external actuators such as electronic expansion valves and solenoid valves can be shortened inside first electrical component box 321. This makes it possible to suppress noise emitted by cables supplying power to the actuators from being superimposed on AC cable 72.

[0045] The main board 50 includes an AC section 51 through which AC current supplied from an external power source flows, a rectifier section 53 including a switching element that converts the AC current supplied from the external power source to DC current, and a DC section 52 through which the DC current converted by the switching element flows. The AC section 51 and DC section 52 are arranged in the left-right direction with the AC section 51 on the right and the DC section 52 on the left, and the AC section 51 is arranged along the right side panel 324b of the first electrical component box 321. The rectifier 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), within the area in the rear panel-side space between the partition panel 360 and the rear panel 323, the AC cable 72 is closer to the AC section 51 than the DC section 52 and is arranged in a position overlapping the AC section 51. The AC unit 51 is disposed along the right side panel 324b, and the AC cable 72 is similarly disposed along the right side panel 324b. The AC cable 72 is routed along the side panel 324b on the right side of the center of the first filter substrate 531 in the left-right direction. In the main substrate 50, noise is generated in the DC unit 52 due to switching by the rectifier unit 53, making the DC unit 52 a stronger noise source than the AC unit 51. However, since the AC cable 72 is disposed on the AC unit 51 side, it is possible to suppress the superimposition of noise onto the AC cable 72. Furthermore, since the AC cable 72 is disposed along the right side panel 324b of the first electrical component box 321, it is possible to position the AC cable 72 away from noise sources inside the first electrical component box 321, thereby suppressing the superimposition of noise onto the AC cable 72.

[0046] In the first filter substrate 531, the input terminal 534 is disposed closer to the AC unit 51 located to the right of the DC unit 52 located to the left of the main substrate 50 disposed below, and the output terminal 535 is disposed closer to the DC unit 52 located to the left of the AC unit 51 located to the right of the main substrate 50. This allows the AC cable 72 to be positioned away from the DC unit 52, which is a source of strong noise, even in a region where the AC cable 72 is above the upper end of the partition plate 360 ​​and electromagnetic shielding by the partition plate 360 ​​is not obtained, thereby suppressing noise superimposition on the AC cable 72. Furthermore, the AC cable 72 can be connected in a straight line from the power supply terminal 73 to the input terminal 534 of the first filter substrate 531. This allows the length of the AC cable 72 to be shortened, further suppressing noise superimposition on the AC cable 72, and facilitating connection of the AC cable 72 because the AC cable 72 does not need to be bent. Furthermore, when viewed from the front side of the first electrical equipment 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 511 is arranged to the left of the main board 50, so 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.

[0047] The main board 50 also includes a display unit 54 and an input unit 55. The electrical component box cover 321a is provided with a window 321b for inspecting the main board 50 inside. The window 321b is disposed in a position facing the display unit 54 and the input unit 55 provided on the main board 50 when the electrical component box cover 321a is attached to the first electrical component box 321. Therefore, when the electrical component box cover 321a is attached to the first electrical component box 321, the display unit 54 and the input unit 55 can be easily viewed and operated through the window 321b. Note that the window 321b does not necessarily have to be disposed in a position facing the display unit 54 and the input unit 55, as long as the display unit 54 and the input unit 55 can be viewed and operated through the window 321b.

[0048] The first service panel 311 is also provided with a window 311a for inspecting the main board 50 inside the first electrical component box 321. The window 311a is located opposite a window 321b provided in the electrical component box cover 321a when the first service panel 311 is attached to the front face 30a of the machine room 30. Therefore, when the first service panel 311 is attached to the front face 30a of the machine room 30 and the electrical component box cover 321a is attached to the first electrical component box 321, the display unit 54 and the input unit 55 can be easily viewed and operated through the window 311a and the window 321b. Note that the window 311a does not necessarily have to be located opposite the window 321b, as long as the display unit 54 and the input unit 55 can be viewed and operated through the window 311a and the window 321b.

[0049] The second electrical equipment box 322 does not house the partition plate 360, power terminal 73, or main board 50 that were arranged in the first electrical equipment box 321, but houses a second filter board 532, a second inverter board 512, a reactor 533, and a second fan driver board 522.

[0050] On the back panel 323 of the second electrical component box 322, the second filter substrate 532 is closer to the top panel 325 and is arranged along the left side panel 324a. Similarly, the second inverter substrate 512 is closer to the bottom panel 326 and is arranged along the right side panel 324b. Similarly, the second fan driver substrate 522 is arranged closer to the right side panel 324b and the top panel 325. Similarly, the reactor 533 is closer to the top panel 325 and is arranged between the second filter substrate 532 and the second fan driver substrate 522. The second filter substrate 532 has an input terminal 534 arranged on the upper left 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 substrate 532 in the left-right direction.

[0051] The wiring connections between 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, an AC cable 72 housed in the first electrical component box 321 and connected to a power supply terminal 73 is connected to an input terminal 534 of the second filter board 532, and power is supplied to the second filter board 532. Further, an output terminal 535 of the second filter board 532 is connected to an input section 513 of the second inverter board 512 by a cable, and the second inverter board 512 is connected to the reactor 533 and the second fan driver board 522 by cables. Further, the AC section 51 of the main board 50 housed in the first electrical component box 321 is connected to the second inverter board 512.

[0052] Since the second filter substrate 532 is disposed closer to the left side panel 324a and the input terminal 534 is disposed to the left of the center of the second filter substrate 532 in the left-right direction, the input terminal 534 is disposed closer to the left side panel 324a. Since the power supply terminal 73 is disposed closer to the right side panel 324b of the first electrical component box 321, the AC cable 72 connected to the power supply terminal 73 and the input terminal 534 of the second filter substrate 532 can be shortened. In other words, the AC cable 72 connected to the power supply terminal 73 and the first filter substrate 531 and the AC cable 72 connected to the power supply terminal 73 and the second filter substrate 532 can each be shortened. Therefore, it is possible to suppress noise superposition on the AC cable 72.

[0053] In this embodiment, the first electrical component box 321 and the second electrical component box 322 are formed from thin metal plates, but they do not have to be made of metal and may be made of a resin containing carbon as long as the material is conductive, because the conductive material can electromagnetically shield the AC cable 72.

[0054] In addition, in this embodiment, the partition plate 360 ​​is formed from a thin metal plate, but it does not have to be made of metal as long as it is made of a conductive material, and it may be made of a resin containing carbon, because a conductive material can electromagnetically shield the AC cable 72.

[0055] Furthermore, in the present 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 and the left and right side plate pieces 362a and 362b, but the raised bottom plate piece 361 and the left and right side plate pieces 362a and 362b do not have to be made of metal or a conductive material. For example, the AC cable 72 passing through a space covered by the raised bottom plate piece 361 and the left and right side plate pieces 362a and 362b, which are not made of a conductive material, will be electromagnetically shielded if the AC cable itself is covered with a conductive covering member within the area where it is located in the back plate side space between the partition plate 360 ​​and the back plate 323. 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, and therefore the cables connecting the main board 50 to external actuators such as electronic expansion valves and solenoid valves can be shortened inside the first electrical component box 321. This makes it possible to suppress the superposition of noise emitted by the cables supplying power to the actuators onto the AC cable 72.

[0056] In this 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 the metal upper plate piece 363 and the metal lower plate piece 364. However, it is not necessary for them to be closed by the metal upper plate piece 363 and the metal lower plate piece 364. However, it is preferable that they are closed by the metal upper plate piece 363 and the metal lower plate piece 364. This is because the AC cable 72 can be more electromagnetically shielded.

[0057] Although the present invention has been described above with reference to a limited number of embodiments, the scope of the invention is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art. [Explanation of symbols]

[0058] 1...outdoor unit, 10...casing, 38a, b...intake port, 50...main board, 51...AC section, 52...DC section, 53...rectification section, 54...display section, 55...input section, 72...AC cable, 73...power 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...rear panel, 324a, b...side panels, 325...upper panel, 326...lower panel, 327...wiring Drawer opening, 360...partition plate, 361...raised bottom plate piece, 362a, b...side plate pieces, 363...upper 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

1. The air conditioner has an outdoor unit having a housing having a top surface, a bottom surface, and a side surface disposed between the top surface and the bottom surface, and is disposed on the side surface of the outdoor unit. The air conditioner has a box-like shape with an open front side and a rear panel on the far side, left and right side panels, an upper top panel, and a lower bottom panel, a filter substrate having an input terminal 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 an electrical equipment box that houses a main board that controls the equipment, a partition plate that divides a part of the internal space of the electrical equipment box into a rear panel side space and a front side space, the power supply terminal, the main board, and the filter board are arranged in this order from bottom to top, the power supply terminal, the main board, and the filter board are arranged on the rear panel, and the main board is arranged on the partition panel and is arranged in the front space, the AC cable passes through the rear panel side space between the partition panel and the rear panel and is connected to the power terminal and the input terminal; An electrical equipment box characterized in that the AC cable is electromagnetically shielded by a conductive member at least in the area where it is arranged in the back panel side space between the partition plate and the back panel.

2. the partition plate is a conductive plate-like member, and includes a flat raised bottom plate piece that is spaced apart from the rear plate, and side plate pieces that extend from both left and right edges of the raised bottom plate piece toward the rear plate and are joined to the rear plate, and has openings at the top and bottom; the AC cable passes through a space covered by the raised bottom plate piece and the left and right side plate pieces of the partition plate and is connected to the power supply terminal and the input terminal; 2. The electrical equipment box according to claim 1, wherein the AC cable is electromagnetically shielded by the conductive partition plate.

3. 3. The electrical equipment box according to claim 1, wherein the main board is supplied with power via the filter board.

4. the main board includes an AC section through which AC current supplied from an external power source flows, a rectifier section including a switching element that converts the AC current into DC current, and a DC section through which the DC current flows, the AC section and the DC section being arranged separately in the left-right direction; 4. The electrical equipment box according to claim 1, wherein the AC cable is arranged closer to the AC section than to the DC section in the area arranged in the rear panel side space between the partition plate and the rear panel.

5. the filter substrate includes an output terminal; the input terminal is disposed closer to the AC section than to the DC section of the main board in the left-right direction; 5. The electrical component box according to claim 4, wherein the output terminal is arranged closer to the DC section than to the AC section of the main board.

6. 6. The electrical component box according to claim 4, wherein the AC section is disposed along the side panel in the left-right direction.

7. 7. The electrical equipment box according to claim 2, wherein at least one of the upper and lower openings of the partition plate is partially closed by a conductive member.

8. The electrical equipment box includes an electrical equipment box cover that covers the open opening of the electrical equipment box, the electrical equipment box cover includes a window portion that allows a portion of the electrical equipment box cover to be opened, The main board includes a display unit and an input unit, the window portion is disposed opposite the display portion and the input portion, 8. The electrical equipment box according to claim 1, wherein the display unit and the input unit are visible through the window.

9. 9. The electrical component box according to claim 1, wherein the input terminal is disposed below the filter substrate.

10. a housing having a top surface, a bottom surface, a side surface disposed between the top surface and the bottom surface, an intake port provided on the side surface, and an outlet port provided with a blower fan on the top surface; an outdoor heat exchanger provided inside the housing for exchanging heat between the refrigerant and the outside air drawn in through the air inlet; a compressor for sending the refrigerant to the outdoor heat exchanger; and a fan motor for driving the blower fan; The electrical equipment box according to any one of claims 1 to 9 is disposed 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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