JP2023141083A - Outdoor unit of air conditioner - Google Patents

Abstract

To provide an outdoor unit of an air conditioner, suppressing noise from outflowing to the outside of the air conditioner due to that noise generated from two inverter substrates is superposed on an AC cable.SOLUTION: An outdoor unit of an air conditioner includes: a first inverter substrate 511 for driving a first compressor, and a second inverter substrate 512 for driving a second compressor; a first filter substrate 531; and a first electric component box 321 and a second electric component box 322 arranged in a left-right direction. The first inverter substrate 511 and the first filter substrate 531 are arranged in the first electric component box 321, and the second inverter substrate 512 is arranged in the second electric component box 322. In the first electric component box 321, the first inverter substrate 511 is arranged along one of lateral face boards of left and right lateral face boards, and an AC cable 72 connected to the first filter substrate 531 is arranged along the other lateral face board of the left and right lateral face boards.SELECTED DRAWING: Figure 6

Description

The present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit of an air conditioner that includes an electrical component box that houses a board on which electronic components are mounted.

The outdoor unit of an air conditioner is equipped with multiple control units inside its casing, including a main board that controls the various actuators of the outdoor unit, and an inverter board that controls the rotation speed of the variable capacity compressor. There is. Such a plurality of control units are connected to each other via wiring cables, and while exchanging data with each other, control the entire air conditioning operation and control components such as the inverter compressor. Here, since noise is generated especially from the inverter board among the plurality of control units, there is a possibility that the noise may be superimposed on the wiring cable that connects the plurality of control units. It is necessary to devise the layout of the wiring cable so that this noise does not affect other control units or the outside of the outdoor unit by being radiated from the wiring cable or propagating within the cable.

However, no matter how much the layout of the distribution cables is devised, it is difficult to completely eliminate the influence of noise from the distribution cables, and the influence of noise from the distribution cables may still remain. In particular, in recent years, with the miniaturization of outdoor units themselves, there are limits to the layout of wiring cables, and it has become difficult to suppress the influence of noise from wiring cables.

Therefore, in order to suppress the influence of noise from the wiring cable, the outdoor unit of the air conditioner disclosed in Patent Document 1 has a casing, a first control unit and a second control unit disposed inside the casing. The second control unit is in wireless communication with the first control unit.

In the outdoor unit of the air conditioner disclosed in Patent Document 1, since the second control unit communicates wirelessly with the first control unit, the plurality of control units arranged inside the casing are connected to each other. The number of wiring cables can be reduced and the influence of noise can be suppressed.

Japanese Patent Application Publication No. 2008-101867

However, in the outdoor unit of the air conditioner disclosed in Patent Document 1, the terminal block to which an AC cable for supplying power from the outside is connected and the inverter board are arranged close to each other. Therefore, when the inverter board drives a variable capacity compressor, the noise generated from the inverter board is superimposed on the AC cable, causing the noise to leak outside the air conditioner and affect other equipment. is still unresolved. In addition, in the outdoor unit of the air conditioner disclosed in Patent Document 1, one of the two compressors is a variable capacity compressor and the other compressor is a fixed capacity compressor, so the inverter board is one However, in recent years, both of the two compressors are often variable capacity compressors. In that case, two inverter boards may be required. As the number of inverter boards increases, the problem that noise leaking outside the air conditioner increases and affects other devices is more likely to occur.

In view of the above problems, an object of the present invention is to provide an outdoor unit for an air conditioner that suppresses noise generated from two inverter boards from being superimposed on an AC cable, thereby suppressing noise from flowing outside the air conditioner. It is something to do.

One aspect of the present invention includes a first compressor, a second compressor, a first inverter board for driving the first compressor, a second inverter board for driving the second compressor, and a power source noise. The filter is box-shaped and has an open front side, including a first filter substrate for removal, a back plate on the back side, side plates on the left and right sides, a top plate on the top side, and a bottom plate on the bottom side, and is arranged in the left-right direction. a first electrical component box and a second electrical component box, a first inverter board and a first filter board are disposed in the first electrical component box, and the second inverter board is arranged in the second electrical component box. In the first electrical component box, the first inverter board is arranged along one of the left and right side panels, and the AC cable connected to the first filter board and supplying power from an external power source is connected to the first filter board. , is an outdoor unit of an air conditioner that is arranged along the other of the left and right side plates.

Other aspects of the present invention include a first compressor, a second compressor, a first inverter board for driving the first compressor, a second inverter board for driving the second compressor, and a power supply noise In order to remove the first inverter board, the first inverter board is a box-shaped box with an open front side, including a first filter board, a back board on the back side, side boards on the left and right sides, a top board on the top side, and a bottom board on the bottom side. An electrical component box that accommodates a second inverter board and a first filter board, the first inverter board is arranged along the left side plate of the left and right side boards, and the second inverter board An AC cable that is placed along the right side panel of the side panels and supplies power from an external power source passes through the center between the first inverter board and the second inverter board, and then connects to the first filter board. This is an outdoor unit of an air conditioner that is wired.

According to the present invention, it is possible to provide an outdoor unit of an air conditioner that suppresses noise generated from two inverter boards from being superimposed on an AC cable, thereby suppressing noise from flowing outside the air conditioner.

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. FIG. 7 is a layout diagram of an electronic board of an electrical component box in an outdoor unit of an air conditioner according to a second embodiment. FIG. 7 is a layout diagram of an electronic board of an electrical component box in an outdoor unit of an air conditioner according to a third 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 a first 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 322 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 AC cable 72 connecting the power supply terminal 73 and the first filter board 531 and the second filter board 532 passes through the rear side space formed by the raised bottom plate piece 361 of the partition plate 360 and the back plate 323, and is inputted. It is connected to terminal 534 and 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 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. are 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.

Furthermore, in the first electrical component box 321, the first inverter board 511 is arranged along the left side plate 324a, and in the second electrical component box 322, the second inverter board 512 is arranged along the right side plate 324b. Therefore, the first inverter board 511 and the second inverter board 512 are arranged at positions separated from each other. Furthermore, in the first electrical component box 321, the AC cable 72 is arranged along the right side plate 324b. Therefore, since the AC cable 72 can be routed through the middle between the first inverter board 511 and the second inverter board 512, it can be separated from the first inverter board 511 and the second inverter board 512. Further, between the AC cable 72 and the second inverter board 512, there is the right side plate 324b of the first electrical component box 321 and the left side plate 324a of the second electrical component box 322, so the second inverter board The AC cable 72 can be electromagnetically shielded from noise generated from the AC cable 512. Thereby, it is possible to suppress noise from being superimposed on the AC cable 72.

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.

Next, the arrangement of electronic boards in the electrical component box 320 according to the second embodiment will be described using FIG. 7. The difference between the arrangement of electronic boards in the electrical component box 320 according to the second embodiment and the arrangement of the electronic boards in the electrical component box 320 according to the first embodiment is that The difference is in the arrangement of the electronic board. Components that are common to the configuration according to the first embodiment are given the same numbering, and explanations thereof will be omitted.

FIG. 7 is a diagram of the electrical component box 320 viewed from the front side (the front side of the machine room 30). 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. Further, 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 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.

As described in the first embodiment, on the back plate 323 of the first electrical component box 321, the power terminal 73 is located near the right side plate 324b and between the bottom plate 326 and the partition plate 360. Ru. Similarly, the first filter substrate 531 is closer to the top plate 325 and is arranged along the right side plate 324b. Similarly, the first inverter board 511 is closer to the bottom plate 326 and is arranged along the left side plate 324a. Similarly, the first fan driver board 521 is arranged near the left side plate 324a and the top plate 325. Similarly, the reactor 533 is disposed near the top plate 325 and between the first filter board 531 and the first fan driver board 521. 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 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. Therefore, the AC cable 72 is connected to the input terminal 534 of the first filter board 531 along the right side plate 324b.

In the second electrical component box 322, on the back plate 323, the second filter board 532 is closer to the top plate 325 and is arranged along the right side plate 324b. Similarly, the second inverter board 512 is closer to the bottom plate 326 and is arranged along the left side plate 324a. Similarly, the second fan driver board 522 is arranged near the left side plate 324a 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. Like the first filter board 532, the second filter board 532 includes an input terminal 534 arranged on the right side of the lower side and an output terminal 535 arranged on the left side. It is placed to the right of the center. Further, the AC cable 72 connected to the power terminal 73 in the first electrical component box 321 is connected to the second filter board 532 in the second electrical component box 322. In the second electrical component box 322, the AC cable 72 moves from the first electrical component box 321 to the second electrical component box 322 above the second inverter board 512, and runs along the left side plate 324a and the top plate 325. , are connected to the input terminal 534 of the second filter board 532.

Positional relationship among the first filter board 531, first inverter board 511, first fan driver board 521, and reactor 533 arranged in the first electrical component box 321 and the second filter board arranged in the second electrical component box 322 532, the second inverter board 512, the second fan driver board 522, and the reactor 533 have the same positional relationship. Therefore, when a worker inspects the first electrical component box 321 and the second electrical component box 322, the worker can easily inspect the first electrical component box 321 and the second electrical component box 322, and can easily perform maintenance work on wiring and the like.

Furthermore, the AC cable 72 is wired at a distance from the first inverter board 511 in the first electrical component box 321 . Furthermore, between the AC cable 72 in the first electrical component box 321 and the second inverter board 512, there is a right side plate 324b of the first electrical component box 321 and a left side plate 324a of the second electrical component box 322. Therefore, the AC cable 72 can be electromagnetically shielded from noise generated from the second inverter board 512. As a result, even when the positional relationship of the boards arranged in the first electrical component box 321 and the second electrical component box 322 is made the same as described above to facilitate inspection and maintenance work, noise to the AC cable 72 can be prevented. Superimposition can be suppressed.

Note that the positional relationship between the first filter board 531, first inverter board 511, first fan driver board 521, and reactor 533 arranged in the first electrical component box 321 and the second As long as the filter board 532, the second inverter board 512, the second fan driver board 522, and the reactor 533 have the same positional relationship, the arrangement of each board is not limited to this. For example, on the back plate 323 of the first electrical component box 321, the reactor 533 is placed near the top plate 325 and along the left side plate 324a, and the first fan driver board 521 is placed on the first inverter board 511. The reactor 533 is disposed higher up between the reactor 533 and the first filter board 531, and on the back plate 323 of the second electrical component box 322, the reactor 533 is located closer to the upper plate 325 and closer to the left side plate 324a. The second fan driver board 522 may be located above the second inverter board 512 and between the reactor 533 and the second filter board 532.

Next, the arrangement of electronic boards in the electrical component box 320 according to the third embodiment will be described using FIG. 8. Note that FIG. 8 is a diagram of the electrical component box 320 viewed from the front side (the front side of the machine room 30). In the electrical component box 320 according to the first embodiment, the first electrical component box 321 is arranged on the left side of the column 40, the second electrical component box 322 is arranged on the right side of the column 40, and the first electrical component box 321 and An electronic board was arranged in each of the second electrical component boxes 322. On the other hand, the electrical component box 320 according to the third embodiment does not have the support 40, and includes a first inverter board 511, a second inverter board 512, a first fan driver board 521, and a second fan driver board in one electrical component box. 522, a first filter board 531, a second filter board 532, two reactors 533, a main board 50, and a power terminal 73, which are different from the first embodiment. The electrical component box 320 according to the third embodiment is different from the electrical component box 320 according to the first embodiment in that there is no support 40 and there is only one electrical component box, but the arrangement of each board is as follows. This is the same as the electrical component box 320 according to the first embodiment. Components that are common to the configuration according to the first embodiment are given the same numbering, and explanations thereof will be omitted.

The configuration of the electrical component box 320 will be explained. The electrical component box 320 is formed of a thin metal plate, and includes a back plate 323 on the back side, a side plate 324a on the left side, a side plate 324b on the right side, a top plate 325 on the upper side, and a bottom plate 326 on the lower side. It has a box shape with the front side open, and is grounded by being connected to the earth via a ground wire (not shown). Three wiring outlet ports 327 are provided on the bottom plate 326 , and cables connected to actuators such as electronic expansion valves and solenoid valves outside the electrical component box 320 pass through the wire outlet ports 327 and are connected to the electrical component box 320 . It is connected to the board placed inside.

An imaginary line extending vertically at the center of the electrical component box 320 in the left-right direction will be described below as a center line (hereinafter referred to as the center line).

The electrical component box 320 includes a first inverter board 511 and a second inverter board 512, a first fan driver board 521 and a second fan driver board 522, a first filter board 531 and a second filter board 532, two reactors 533, A main board 50 and a power terminal 73 are housed therein.

In the back plate 323 of the electrical component box 320, a first inverter board 511, a first fan driver board 521, a first filter board 531, a reactor 533, a main board 50, and a power supply terminal 73 are housed on the left side of the center line. Further, in the back plate 323 of the first electrical component box 321, a partition plate 360 is arranged on the left side of the center line. A detailed description of the configuration of the partition plate 360 will be omitted because it is the same as the partition plate 360 according to the first embodiment described above. A second inverter board 512, a second fan driver board 522, a second filter board 532, and a reactor 533 are housed on the right side of the center line.

On the back plate 323 on the left side of the center line of the electrical component box 320, the partition plate 360 is arranged closer to the bottom plate 326 along the center line. Similarly, the power terminal 73 is arranged between the bottom plate 326 and the partition plate 360 along the center line. Similarly, the first filter substrate 531 is arranged along the center line on the center line side of the left side plate 324a and along the top plate 325. Similarly, the first inverter board 511 is arranged near the bottom plate 326 along the left side plate 324a. Similarly, the reactor 533 is arranged near the top plate 325 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 electrical component box 320 (the front side of the machine room 30), the power terminal 73, the main board 50, and the first filter board 531 are arranged in order from bottom to top. , and the first filter substrate 531 are arranged in this order.

On the back plate 323 on the right side of the center line in the electrical component box 320, the second filter board 532 is arranged along the center line and along the top plate 325 closer to the center line than the right side plate 324b. Ru. Similarly, the second inverter board 512 is arranged near the bottom plate 326 and along the right side plate 324b. Similarly, the second fan driver board 522 is arranged along the top plate 325 and along the right side plate 324b. Similarly, the reactor 533 is arranged near the top plate 325 and between the second filter board 532 and the second fan driver board 522.

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. Further, 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 on the left side of the center of the second filter board 532 in the left-right direction. ing. Since the first filter board 531 is arranged along the center line and the second filter board 532 is also arranged along the center line, the input terminal 534 of the first filter board 531 and the input terminal 534 of the second filter board 532 are Both are placed near the center line.

The power supply terminal 73 is arranged along the center line, and the input terminal 534 of the first filter board 531 and the input terminal 534 of the second filter board 532 are both arranged near the center line. The AC cable 72 connected to the input terminal 534 of the first filter board 531 and the AC cable 72 connected to the power supply terminal 73 and the input terminal 534 of the second filter board 532 can be respectively shortened. Therefore, superimposition of noise on the AC cable 72 can be suppressed.

Further, since the first inverter board 511 is arranged along the left side side plate 324a and the second inverter board 512 is arranged along the right side side plate 324b, the first inverter board 511 and the second inverter board 511 are located far apart from each other. Therefore, since the AC cable 72 can be routed through the middle between the first inverter board 511 and the second inverter board 512, it can be separated from the first inverter board 511 and the second inverter board 512. , superimposition of noise on the AC cable 72 can be suppressed.

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 (11)

a first compressor and a second compressor;
a first inverter board for driving the first compressor and a second inverter board for driving the second compressor;
a first filter board for removing power supply noise;
A first electrical component box and a second electrical component box are arranged in the left-right direction, and are box-shaped with an open front side, including a rear panel on the back side, side panels on the left and right sides, a top panel on the upper side, and a bottom panel on the lower side. Equipped with a product box and
the first inverter board and the first filter board are arranged in the first electrical component box,
the second inverter board is arranged in the second electrical component box,
In the first electrical component box, the first inverter board is arranged along one of the left and right side panels, and is connected to the first filter board and has an AC cable that supplies power from an external power source. An outdoor unit of an air conditioner, characterized in that the outdoor unit is arranged along the other of the left and right side plates. The other side plate of the left and right side plates of the first electrical component box is on the second electrical component box side,
The outdoor unit of an air conditioner according to claim 1, wherein one of the left and right side plates of the second electrical component box is located on the first electrical component box side. The first filter board is arranged along the other side plate of the left and right side plates of the first electrical component box,
In the first electrical component box, the AC cable arranged along the other of the left and right side plates is closer to the other of the left and right side plates than the center of the first filter board in the left-right direction. 3. The outdoor unit of an air conditioner according to claim 2, wherein the wiring is routed through the side plate side of the air conditioner. a second filter board disposed in the second electrical component box;
the AC cable is connected to the second filter board,
The outdoor unit of an air conditioner according to claim 2 or 3, wherein the second filter board is arranged along one of the left and right side plates of the second electrical component box. . 5. The second inverter board according to claim 2, wherein the second inverter board is arranged along the other of the left and right side plates of the second electrical component box. Outdoor unit of air conditioner. a second filter board disposed in the second electrical component box;
The positional relationship between the first inverter board and the first filter board in the first electrical component box is the same as the positional relationship between the second inverter board and the second filter board in the second electrical component box. The outdoor unit of an air conditioner according to claim 1 or 2, characterized in that: The first filter board and the second filter board each include an input terminal to which the AC cable is connected,
The input terminal of the first filter board is arranged on the side of the other side plate of the left and right side plates of the first electrical component box,
5. The air conditioner according to claim 4, wherein the input terminal of the second filter board is disposed on one of the left and right side panels of the second electrical component box. Outdoor unit. a first compressor and a second compressor;
a first inverter board for driving the first compressor and a second inverter board for driving the second compressor;
a first filter board to remove power supply noise;
The first inverter board, the second inverter board, and the first An electrical equipment box that accommodates a filter board;
The first inverter board is arranged along the left side plate of the left and right side plates,
The second inverter board is arranged along the right side plate of the left and right side plates,
An AC cable for supplying power from an external power source passes between the first inverter board and the second inverter board, and then is wired to the first filter board. Machine. comprising a second filter substrate;
The first filter board is arranged to the left of the center in the left-right direction in the electrical component box,
The second filter board is arranged on the right side of the center in the left-right direction in the electrical component box,
The AC cable is located closer to the center of the electrical component box in the left-right direction than to the center of the first filter board in the left-right direction, and is closer to the center of the electrical component box than the center of the second filter board in the left-right direction. The outdoor unit of an air conditioner according to claim 8, wherein the wiring is connected to the first filter board and the second filter board through the center in the left-right direction. The first filter board is placed closer to the center in the left-right direction than the left side plate of the electrical component box, and the second filter board is placed closer to the center in the left-right direction than the right side plate of the electrical component box. The outdoor unit of an air conditioner according to claim 9, wherein the outdoor unit is arranged in a. The first filter board and the second filter board each include an input terminal to which the AC cable is connected,
The air filter according to claim 9 or 10, wherein the input terminal of the first filter board and the input terminal of the second filter board are arranged on the center side in the left-right direction of the electrical component box. Outdoor unit of the harmonizer.

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