JP2022041570A - Outdoor unit for air conditioner - Google Patents

Abstract

To surely cool (cool by air) a heat generating component in an outdoor unit in which two air blowing fans are arranged side by side, even in one fan operation mode in which one air blowing fan is in an operated state.SOLUTION: An outdoor unit 1 for the air conditioner comprises a casing 10 which is partitioned into an air blowing fan room 20 on the upper part and a machine room 30 on the lower part, two air blowing fans, namely, a first air blowing fan 210b and a second air blowing fan 210a are arranged side by side in the air blowing fan room 20, a first electrical equipment box 321 is arranged in the machine room 30 at the windward side of the first air blowing fan 210a, and a second electrical equipment box 322 is arranged at the windward side of the second air blowing fan 210b. In the outdoor unit 1, heat generating components 511, 512, 521, 522 are arranged intensively on the second electrical equipment box 322 side. In one fan operation in which only one of the two air blowing fans 210a, 210b is operated, the second air blowing fan 210b is operated.SELECTED DRAWING: Figure 5

Description

The present invention relates to an outdoor unit of an air conditioner, and more specifically to an outdoor unit of an air conditioner having two blower fans.

In many cases, the outdoor unit of an air conditioner is divided into a blower room in which a blower fan is housed and a machine room in which a heat exchanger and a compressor are housed. In the upper blowout type outdoor unit, an air outlet is provided on the top surface (upper surface) of the housing, the blower room is arranged at the upper part of the housing, and the machine room is arranged at the lower part of the housing. An electrical component box containing control system electrical components is also installed in the machine room.

For large models that require large air conditioning capacity, there are multiple blower fans (for example, two blower fans and second blower fan) and multiple compressors (for example, first compressor and second compressor). (2 units) are also installed. In this case, for example, the inside of the housing is further divided into left and right. When the housing is viewed from the front, the machine room is divided into a left machine room on the left side and a right machine room on the right side, and the blower room is also divided into a left blower room on the left side and a right blower room on the right side.

A first compressor is arranged in the left machine room, a second compressor is arranged in the right machine room, a first blower fan is arranged in the left blower room, and a second blower fan is arranged in the right blower room. The heat exchanger may be integrated into the left machine room and the right machine room, or it may be divided into two and arranged separately in the left machine room and the right machine room. be.

Further, an electrical component box (referred to as a first electrical component box) is arranged in the left machine room, and an electrical component box (referred to as a second electrical component box) is arranged in the right machine room.

Various control circuit boards are mounted in each electrical component box, and the inverter board for the compressor and the inverter board for the fan motor are included in the control circuit board. Usually, these inverter boards are equipped with IPMs (Intelligent Power Modules), which are semiconductor elements for electric power.

For example, IPMs and electrolytic capacitors need to be cooled because they generate heat by themselves when the inverter board on which they are mounted operates. Normally, a heat sink is attached to heat-generating parts such as IPM, but since it is further exposed to air flow to cool it, the air flow passes through the first electrical equipment box in the left machine room due to the rotation of the first blower fan in the left blower room. It is placed in the position where it is. Similarly, the second electrical component box is arranged in the right machine room at a position where the air flow passes by the rotation of the second blower fan in the right blower room. Each electrical component box has an air inflow section at the bottom and an air outflow section at the top.

According to this, a part of the air flowing in the left machine room by the operation of the first blower fan flows in the first electrical equipment box, and a part of the air flowing in the right machine room by the operation of the second blower fan Since the air flow flowing in the second electrical component box is formed, the heat generating component such as the IPM is cooled by the flowing air.

By the way, the first blower fan and the second blower fan are not always operated (two fan operation mode). For example, when the indoor unit side reaches near the set temperature, the number of indoor units in operation has decreased. When the capacity request from the indoor unit such as the above becomes small, the one-fan operation mode in which either the first blower fan or the second blower fan is operated may be entered.

Conventionally, when entering the one-fan operation mode, which blower fan is to be operated is not particularly determined, and the control unit randomly selects the blower fan to be operated. As for the compressor, in consideration of preventing the bias of the refrigerating machine oil, both the first compressor and the second compressor may be continuously operated in the one-fan operation mode, and one of the compressors may be compressed. In some cases, the aircraft are operated alternately.

For example, when the first blower fan on the left side is selected as the operating side, it becomes difficult for air to flow to the second electrical component box on the leeward side of the second blower fan on the right side. Therefore, there arises a problem that even if the IPM of the inverter board for the compressor in the second electrical component box generates heat due to the operation of the second compressor, the cooling becomes insufficient.

Japanese Unexamined Patent Publication No. 2018-4230 (see FIG. 5)

Therefore, the subject of the present invention is that in the outdoor unit of an air conditioner having at least two blower fans, in the one-fan operation mode in which only one blower fan is in the operating state, the air flow by the one blower fan causes the air flow. It is an object of the present invention to provide an outdoor unit of an air conditioner that can be air-cooled including a heat generating component that should be air-cooled by the other blower fan.

In order to solve the above problems, the first aspect of the present invention is a blower room in which at least two blowers, a first blower fan and a second blower fan, are arranged side by side in the upper part, and a compressor and heat in the lower part. It comprises a refrigerant circuit including a exchanger and a housing partitioned into a machine room in which an electrical component box containing at least a control unit for controlling the operation of the compressor and the blower fan is arranged.
On the windward side of the blower fan that is operated during the operation of one fan that operates only one of the above two blower fans, the heat generating parts that need to be cooled are collectively arranged in the control unit. It is characterized by.

In the second aspect of the present invention, the electrical component box is composed of a first electrical component box on the windward side of the first blower fan and a second electrical component box on the windward side of the second blower fan, and one fan. It is characterized in that the second electrical component box containing the heat generating parts is arranged on the windward side of the second blower fan operated during operation.

Further, in the third aspect of the present invention, a support column for supporting the blower room is erected in the machine room, and the support column is arranged between the first electrical component box and the second electrical component box. It is characterized by being done.

Further, in the second electrical component box, an air flow path through which air in the machine chamber flows from the lower side to the upper side is formed, and as the second blower fan operates, the substrate surface in the second electrical component box is formed. It is characterized by the fact that air flows from the bottom to the top along it.

According to the present invention, in the outdoor unit of an air conditioner having at least two blower fans, the heat generating parts are surely cooled (air-cooled) even in the one-fan operation mode in which only one blower fan is in the operating state. Can be done.

The perspective view which shows the appearance of the outdoor unit of the air conditioner which concerns on embodiment of this invention. The perspective view which shows the service panel separated from the housing of the said outdoor unit. The perspective view which shows the state which exposed the whole front of the machine room of the said outdoor unit. The front view which shows the electric component box divided into two of the said outdoor unit. Front view showing the inside of the above electrical equipment box with the electrical equipment box cover removed. The schematic diagram which shows the air flow path in the said electrical equipment box. A perspective view showing a state in which both of the above-mentioned two-divided electrical component boxes are opened. Front view showing a part of the electric component box adjacent to the center pillar and both sides thereof. The perspective view which shows the hinge part attached to the said center pillar by disassembling. An enlarged view of a main part for explaining the hinge structure of the above electrical equipment box. The main part perspective view which shows the drawer part formed in the electric component box divided into two. The schematic diagram which shows the routing part of the connection wiring which is hung between the electric component boxes divided into two. The main part perspective view which shows the state which covered the wiring part of the said connection wiring with a wiring cover. (A) A perspective view seen from the front and (b) a perspective view seen from the rear of the wiring cover. The perspective view seen from the rear which shows the preferable aspect of the said wiring cover. An enlarged perspective view of a main part showing a state in which an electrical component box cover is covered on both sides of the wiring cover. FIG. 16 is a cross-sectional view taken along the line AA of FIG.

Next, some embodiments of the present invention will be described with reference to FIGS. 1 to 17, but the present invention is not limited to these embodiments.

<< Overall configuration (implementation of basic configuration) >>
First, with reference to FIGS. 1 to 4, the outdoor unit (hereinafter, may be simply referred to as an outdoor unit) 1 of the air conditioner according to the present embodiment includes a rectangular parallelepiped housing 10. Since the outdoor unit 1 is an upper blowout type, the blower room 20 is arranged in the upper part of the housing 10, and the machine room 30 is arranged in the lower part thereof.

The blower chamber 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 two propeller fan type blower fans 210a and 210b are inside the blower room 20. Are arranged side by side in the left-right direction. Further, the top panel 235 of the blower chamber 20 is provided with fan guards 220a and 220b for the blower fans 210a and 210b. In FIG. 4, when the housing 10 is viewed from the front, the space in the blower chamber 20 in which the left blower fan 210a (first blower fan) is arranged is the left blower chamber 20L and the right blower fan 210b (second blower fan 210b). The space where the blower fan) is arranged is 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), and FIGS. 1 and 2 show the front surface 30a, the right side surface 30b, and the left side surface 30c. A bottom plate 301 as a base is arranged on the bottom surface of the machine room 30, and the upper surface of the machine room 30 communicates with the blower room 20.

On the front surface 30a of the machine room 30, four service panels 311, 312, 313, 314 that are removed at the time of maintenance are provided. When it is not necessary to distinguish between these service panels 311 to 314, they are collectively referred to as a service panel 310.

A compressor, a heat exchanger 36, and the like are housed in the machine room 30. Although not shown in detail, in the present embodiment, the heat exchanger 36 extends from the left side surface 30c of the machine room 30 to the back surface and the center of the housing 10 according to the arrangement of the first blower fan 210a and the second blower fan 210b. They are arranged in a U-shape (U-shape) in a plan view. The heat exchanger 36 has a symmetrical shape divided into two units.

The electrical component box 320 is arranged in the upper part on the front surface 30a side of the machine room 30, and FIG. 3 shows a state in which the electrical component box 320 is removed to expose the entire front surface 30a of the machine room 30.

This outdoor unit 1 is a large outdoor unit used for a multi air conditioner for buildings (multi air conditioner for business use) and the like. It is equipped with a compressor. In the present embodiment, the compressor is housed in the compressor storage box (compressor box) 353, and is not shown.

Further, the electrical component box 320 is also large, and has a size covering the entire width from the left end portion 30L to the right end portion 30R of the front surface 30a of the machine room 30. In the present embodiment, as shown in FIGS. 4 and 5, the electrical component box 320 includes two units, 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 center pillar (post arranged in the center) 40 having a predetermined width is erected in order to increase the rigidity of the housing 10. The front surface 30a of the machine room 30 is divided into a left side and a right side by the center pillar 40, and the first electrical component box 321 is arranged on the left side (between the left end portion 30L and the center pillar 40) of the front surface 30a of the machine room 30. 2 The electrical component box 322 is arranged on the right side (between the right end portion 30R and the center pillar 40) of the front surface 30a of the machine room 30. The first electrical component box 321 and the second electrical component box 322 are arranged apart from each other with the center pillar 40 having a predetermined width interposed therebetween, so that the influence of heat exerted on each other is reduced.

Both the first electrical component box 321 and the second electrical component box 322 have a box body with an open front surface including a square side frame and a bottom plate, and the electrical component box cover is on the front of the first electrical component box 321. An electrical component box cover 322a is attached to the front of the 321a and the second 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 inside of the first electrical component box 321 and the second electrical component box 322 is as shown in FIG. Is exposed. The electrical component box cover 321a of the first electrical component box 321 is provided with a small window 321b for inspecting the internal control unit 50.

In the present embodiment, as shown in FIGS. 1 and 2, the front surface 30a of the machine room 30 is virtually divided into four surfaces of 2 rows × 2 columns, and a service panel 310 is attached to each of them. .. The service panel 310 consists of four panels, a first service panel 311, a second service panel 312, a third service panel 313, and a fourth service panel 314, of which two are the first service panel 311 and the second service panel 312. Is a service panel that covers the front surface 30a side of the electrical equipment box.

The first service panel 311 and the second service panel 312 have the same outer shape and size, and are 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. Arranged side by side.

The third service panel 313 and the fourth service panel 314 are service panels that cover the front surface 30a side of the compressor 350 (first compressor 351 and second compressor 352) and the like. The third service panel 313 and the fourth service panel 314 have the same outer shape and size, and the first compressor 351 and the second compressor 352 are arranged side by side so as to cover the front 30a side of the machine room 30. Will be done. By removing the third service panel 313 and the fourth service panel 314, the compressor 350 (first compressor 351 and first compressor 352) and the like can be touched.

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

In FIG. 3, the first to fourth four service panels 310 and the electrical component box 320 (first electrical component box 321 and second electrical component box 322) were removed to expose the inside of the machine room 30. The state is shown. Of the machine room 30, the windward side of the left blower room 20L is referred to as the left machine room 300L, and the windward side of the right blower room 20R is referred to as the right machine room 300R. The leeward side is the upstream side where air flows from the blower room (blower fan), and the leeward side is the downstream side where air is sent out from the blower room (blower fan).

<< Cooling of heat-generating parts (first embodiment) >>
The configuration of the electrical component box 320 will be described with reference to FIGS. 4 and 5. As described above, the outdoor unit 1 according to the present embodiment has two compressors (first compressor 351 and second compressor 352) and two blower fans (first blower fan 210a, second blower). It is equipped with a 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 a compressor (first inverter board 511, second inverter board 512) and two fan driver boards for driving a blower fan (first fan drive board 521, 1). It is equipped with a second fan drive board 522). These fan drive boards are inverter boards for fan motors.

The first inverter board 511 is for the first compressor 351 and 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. It is for the blower fan 210b.

An IPM (Intelligent Power Module), which is a power semiconductor element, is mounted on each of these substrates 511,512,521,522 as an example. The IPM generates heat when it operates. Further, two smoothing circuit boards (first smoothing circuit board 531 and second smoothing circuit board 532) including an electrolytic capacitor are provided. The first smoothing circuit board 531 is for the first inverter board 511, and the second smoothing circuit board 532 is for the second inverter board 512. The electrolytic capacitors included in these smoothing circuit boards 531 and 532 also generate heat due to the operation of the IPM.

Therefore, as shown in FIG. 7, a heat sink 54 is attached to the back surface of each substrate 511,512,521,522 for heat dissipation of heat-generating components.

According to this embodiment, an inverter board (first inverter board 511, second inverter board 512), a fan driver board (first fan driver board 521, second fan driver board 522) and a smoothing circuit board (first fan driver board 522) having heat generating components are provided. The 1 smoothing circuit board 531 and the 2nd smoothing circuit board 532) are collectively arranged in the second electrical component box 322 (corresponding to the second electrical component box in claim 1) on the wind side of the second blower fan 210b. There is.

As shown in FIG. 6, at least the second electrical component box 322 is provided with an air inflow section 320a at the bottom and an air outflow section 320b at the top, and air outflow from the air inflow section 320a by the operation of the second blower fan 210b. Air flows into the second electrical component box 322 toward the portion 320b (see the arrow in FIG. 6). The first electrical component box 321 may also be provided with an air inflow portion 320a below and an air outflow portion 320b above.

In the present embodiment, on the first electrical component box 321 side, a control unit 50 for controlling the operation of the first blower fan 210a, the second blower fan 210b, the first compressor 351 and the second compressor 352, etc. is provided. It is provided. A mylo computer, a CPU (central processing unit), or the like may be used for the control unit 50. The control unit 50 may be provided on the second electrical component box 322 side.

For example, when the temperature of the space where the indoor unit is installed reaches near the set temperature, or when the number of operating indoor units decreases, the control unit 50 of the first blower fan 210a and the second blower fan 210b. The one-fan operation mode in which only one of them is operated is entered, and in this one-fan operation mode, the control unit 50 always selects the blower fan 210b which is on the windward side of the second electrical component box 322.

As a result, the inverter board (first inverter board 511, second inverter board 512) and the fan driver board (first fan driver board 521, second fan driver board 522) are collectively arranged in the second electrical component box 322. Air surely flows through the heat sink 54 on the back surface of the above, and each of them is effectively cooled. In this case, since the fan driver board 521 of the first blower fan 210a, which is on the suspension side in the 1-fan operation mode, does not generate heat, it is provided not on the second electrical component box 322 side but on the first electrical component box 321 side. May be good.

The inverter board (first inverter board 511, second inverter board 512) and fan driver board (first fan driver board 521, second fan driver board 522) having each heat generating component are placed on the first electrical component box 321 side. When they are collectively arranged, the blower fan 210a on the wind side of the first electrical component box 321 is selected in the one fan operation mode.

In addition, the compressors need to be operated alternately in order to prevent the refrigerating machine oil from being biased. Therefore, the board on which the inverter board for driving the compressor is mounted needs to be arranged directly under the blower fan operated during the operation of one fan.

Regarding the arrangement of each board in the electrical component box 320, the smoothing circuit board (first smoothing circuit board 531 and second smoothing circuit board 532) is the upper part in the electrical component box, and the inverter board (first inverter board 511 and second inverter). The substrate 512) and the fan driver substrate (first fan driver substrate 521, second fan driver substrate 522) are preferably arranged below the substrate 512).

With such an arrangement, the distance between the inverter board (first inverter board 511, second inverter board 512) and the compressor (first compressor 351 and second compressor 352) becomes shorter. , Wiring work becomes easy. Further, the heat sink 54 of the inverter board (first inverter board 511, second inverter board 512) and the fan driver board (first fan driver board 521, second fan driver board 522) is a smoothing circuit board (first smoothing circuit board 531). , The second smoothing circuit board 532) is not exposed to the warmed air by cooling. Therefore, it is possible to effectively cool the inverter board and the fan driver board, which generate more heat than the smoothing circuit board.

Further, it is also effective to provide a partition plate between the high temperature region by the heat generating component and the other low temperature region in order to prevent heat propagation. As described above, the first electrical component box 321 and the second electrical component box 322 are separated from each other by the center pillar 40, so that the influence of heat on each other is reduced. Further, the distance is separated by the right side plate 321R of the first electrical component box 321 and the left side plate 322L of the second electrical component box 322. As a result, the wind flowing in the first electrical component box 321 and the second electrical component box 322 can easily flow up and down.

<< Opening / Closing Mechanism of Electrical Equipment Box (Second Embodiment) >>
Next, the opening / closing mechanism of the electrical component box 320 (first electrical component box 321 and second electrical component box 322) will be described with reference to FIGS. 7 to 10.

In the outdoor unit 1 according to the present embodiment, the electrical component box 320 is divided into a first electrical component box 321 and a second electrical component box 322 due to the increase in size of the electrical component box 320, but the housing 10 The following configuration is adopted to improve the ease of assembly (removability) and maintainability.

As described above, the front surface 30a of the machine room 30 is divided into the left side and the right side by the center pillar 40, and the first electrical component box 321 on the left side is arranged on the left side of the front surface 30a of the machine room 30 and is on the right side. The second electrical component box 322 is arranged on the right side of the front surface 30a of the machine room 30, but the right side frame (right side) 321R of the first electrical component box 321 and the left side frame (left side) 322L side of the second electrical component box 322 are located. Each is connected to the center pillar 40 via a hinge so that it can be opened and closed and can be attached and detached.

As shown in FIGS. 8 and 9, the center pillar 40 is a U-shaped pillar including a front portion (front portion) 40F, a left side surface portion 40L, and a right side surface portion 40R. With reference to FIG. 3, the front portion 40F is arranged inside the housing 10 at a predetermined interval with respect to the front surface 30a of the machine room 30. That is, the center pillar 40 is arranged at a position one step deeper than the front surface 30a of the machine room 30.

As will be described later, this is because the center pillar 40 does not protrude the connection wiring 329 (see FIG. 12) that electrically connects the first electrical component box 321 and the second electrical component box 322 from the front surface 30a of the machine room 30. This is to pass the front portion 40F side of the.

Of the hinges shown in FIG. 10, the rotation axis (boss 612,632) of the first hinge 6 on the right side frame 321R side of the first electrical component box 321 is on the side of the left side surface portion 40L of the center pillar 40 (in FIG. 8). (Left side), and is arranged at the specified left fulcrum position 60a closer to the front surface 30a of the machine room 30 than the front surface portion 40F of the center pillar 40.

Further, the other second hinge 7 arranged on the left side frame 322 side of the second electrical component box 322 has its rotation axis (boss 712,732) sideways to the right side surface portion 40R of the center pillar 40 (right side in FIG. 8). ), And is arranged at the specified right fulcrum position 70a closer to the front surface 30a of the machine room 30 than the front surface portion 40F of the center pillar 40.

The fulcrum position 60a on the left side of the first hinge 6 and the fulcrum position 70a on the right side of the second hinge 7 are symmetrical with respect to the center pillar 40 inside the front surface 30a of the machine room 30.

In this way, by setting the fulcrum position 60a on the left side of the first hinge 6 and the fulcrum position 70a on the right side of the second hinge 7 to the specified positions, the first electrical component box 321 and the second electrical component box 322 are centered. It can be opened and closed without any trouble at a position closer to the pillar 40.

Next, a specific configuration of the first hinge 6 on the right side frame 321R side of the first electrical component box 321 will be described. The first hinge 6 includes a first upper hinge 6U arranged between the right side frame 321R of the first electrical component box 321 and the left side surface portion 40L of the center pillar 40 and above the left side surface portion 40L of the center pillar 40, and a first electrical component box. A first lower hinge 6L arranged between the right side frame 321R of 321 and the left side surface portion 40L of the center pillar 40 and at the lower portion between them is included.

The first upper hinge 6U is composed of a combination of a male hinge portion 61 and a female hinge portion 62. The male hinge portion 61 has a tongue piece portion 611 and a tongue piece that project horizontally (parallel to the bottom plate 301 of the housing 10) in the lateral direction (leftward in FIGS. 8 and 9) from the left side surface portion 40L of the center pillar 40. It is provided with a cylindrical or columnar boss 612 vertically erected on the upper surface of the portion 611.

The female hinge portion 62 has a hinge piece 621 that projects horizontally from the right frame 321R of the first electrical component box 321 so as to overlap the tongue piece portion 611, and the hinge piece 621 has a bearing that fits into the boss 612. A hole 622 is drilled.

The first lower hinge 6L is composed of a combination of a male hinge portion 63 and a female hinge portion 64. The male hinge portion 63 is vertically erected on the tongue piece portion 631 protruding horizontally (to the left in FIGS. 8 and 9) from the left side surface portion 40L of the center pillar 40 and the upper surface of the tongue piece portion 631. It is equipped with a cylindrical or columnar boss 632.

The boss 612 of the first upper hinge 6U and the boss 632 of the first lower hinge 6L are both coaxially arranged at the fulcrum position 60a on the left side.

The female hinge portion 64 has a hinge piece 641 projecting horizontally from the right frame 321R of the first electrical component box 321 so as to overlap the tongue piece portion 631, and the hinge piece 641 has a bearing fitted to the boss 632. A hole 642 is drilled.

Next, the second hinge 7 on the left side frame 322L side of the second electrical component box 322 will be described. The second hinge 7 includes a second upper hinge 7U arranged at an upper portion closer to the blower chamber 20 side between the left side frame 322L of the second electrical component box 322 and the right side surface portion 40R of the center pillar 40, and the second electrical component. A second lower hinge 7L arranged at the lower part near the bottom plate 301 side between the left side frame 322L of the product box 322 and the right side surface portion 40R of the center pillar 40 is included.

The second upper hinge 7U is composed of a combination of a male hinge portion 71 and a female hinge portion 72. The male hinge portion 71 is erected vertically on the tongue piece portion 711 protruding horizontally from the right side surface portion 40R of the center pillar 40 (to the right in FIGS. 8 and 9) and the upper surface of the tongue piece portion 711. It is equipped with a cylindrical or columnar boss 712.

The female hinge portion 72 has a hinge piece 721 that horizontally projects from the left side frame 322L of the second electrical component box 322 so as to overlap the tongue piece portion 711, and the hinge piece 721 has a bearing fitted to the boss 712. A hole 722 is drilled.

The second lower hinge 7L is composed of a combination of a male hinge portion 73 and a female hinge portion 74. The male hinge portion 73 is vertically erected on the tongue piece portion 731 and the upper surface of the tongue piece portion 731 that horizontally project laterally (to the right in FIGS. 8 and 9) from the right side surface portion 40R of the center pillar 40. It is equipped with a cylindrical or columnar boss 732.

The boss 712 of the second upper hinge 7U and the boss 732 of the second lower hinge 7L are both coaxially arranged at the fulcrum position 70a on the right side.

The female hinge portion 74 has a hinge piece 741 projecting horizontally from the left side frame 322L of the second electrical component box 322 so as to overlap the tongue piece portion 731, and the hinge piece 741 has a bearing fitted to the boss 732. A hole 742 is drilled.

In the present embodiment, the male hinge portion 61 of the first upper hinge 6U and the male hinge portion 71 of the second upper hinge 7U are integrally formed with the attachment metal fitting 410, and are formed on the front portion 40F of the center pillar 40 via the bracket 411. It is fixed.

Further, the male hinge portion 63 of the first lower hinge 6L and the male hinge portion 73 of the second lower hinge 7L are integrally formed with the attachment fitting 420 and fixed to the front portion 40F of the center pillar 40 via the attachment fitting 420. Will be done. In FIG. 10, reference numeral 421 is a receiving metal fitting for locking a part of service panels 311, 312 for an electrical component box.

By adopting such hinges (first hinge 6, second hinge 7), as shown in FIG. 7, the first electrical component box 321 and the second electrical component box 322 are placed on the center pillar 40 side at the time of maintenance. It can be opened as a fulcrum.

Further, the first electrical component box 321 can be removed by lifting the first electrical component box 321 and removing the bearing holes 622,642 from the boss 612,632. Similarly, in order to remove the second electrical component box 321, the second electrical component box 322 may be lifted and the bearing holes 722 and 742 may be removed from the bosses 712 and 732.

The mounting method will be described by taking the first electrical component box 321 as an example. By fitting the bearing holes 622,642 to the bosses 612,632, the first electrical component box 321 can be rotated (openable and closable) to the center pillar 40. ), But it is preferable that the axial length of the lower boss 632 is longer than the axial length of the upper boss 612.

According to this, first, the lower bearing hole 642 is fitted to the boss 632 of the other party, and then the upper bearing hole 622 is fitted to the boss 612 of the other party. Compared with the case where the 642 is fitted to the bosses 612 and 632 at the same time, the fitting work becomes easier.

<< Routing of connection wiring laid between each electrical component box (third embodiment) >>
As described above, as the electrical component box 320 is divided into the first electrical component box 321 and the second electrical component box 322, the first electrical component box 321 and the second electrical component box 322 are divided. The connection wiring will be laid between the two, but it is preferable to secure the wiring path on the front portion 40F of the center pillar 40 for the convenience of the wiring work and maintenance. Therefore, the configuration will be described with reference to FIGS. 11 to 17.

First, as shown in FIG. 11, as a preferred embodiment, the curtain plate 430 is attached to the front portion 40F of the center pillar 40. The curtain plate 430 also serves as a decorative plate, but when viewed from the front surface 30a of the machine room 30, the gap G between the right frame 321R of the first electrical equipment box 321 on the left side and the left side surface portion 40L of the center pillar 40 (see FIG. 8). ) And the gap G (see FIG. 8) between the left side frame 322L of the second electrical component box 322 on the right side and the right side surface portion 40R of the center pillar 40.

Next, when pulling out the connection wiring from the electrical equipment box, providing an opening in the electrical equipment box cover of the electrical equipment box may allow rainwater to enter, so the electrical equipment facing the service panels 311, 312 (310) It is not preferable to provide an opening in the product box cover.

Therefore, as shown in FIGS. 11 and 12, a drawer portion 330 of the connection wiring 329 is formed on the right side frame 321R on the first electrical component box 321 side. Further, on the second electrical component box 322 side, a drawer portion 330 of the connection wiring 329 is formed on the left side frame 322L thereof.

According to the present embodiment, the drawer portion 330 of the first electrical component box 321 is a notch groove 331 formed in a part of the front end side of the right side frame 321R thereof, and similarly, the drawer portion 330 of the second electrical component box 322 is used. Is a notch groove 332 formed in a part of the left side frame 322L on the front end side.

In the present embodiment, the notch grooves 331 and 332 are each made into one large notch, but as shown in FIG. 7, two notch grooves 331 and 332 may be formed respectively. The number of notched grooves 331 and 332 provided is arbitrary.

In front of the curtain plate 430, between the notch grooves 331 and 332 is used as a routing portion 440 of the connection wiring 329. As described above, since the front portion 40F of the center pillar 40 is retracted inside the housing 10 from the front surface 30a of the machine room 30, even if the curtain plate 430 is provided, the connection wiring 329 is machined. It can pass in front of the front portion 40F of the center pillar 40 without protruding from the front surface 30a of the chamber 30.

With reference to FIGS. 13 and 14, the wiring cover 450 is put on the wiring routing portion 440. The wiring cover 450 has a size (a size straddling between the notch grooves 331 and 332) that covers the notch groove 331 on the first electrical component box 321 side and the notch groove 332 on the second electrical component box 322 side. ing.

In the present embodiment, since the wiring cover 450 is made of sheet metal, both ends 451 and 451 of the wiring cover 450 are folded back to the front side so that the cut end does not hit the connection wiring 329 so that the cut end portion does not damage the connection wiring 329. ing.

According to the present embodiment, as shown in FIG. 12, the wiring holding member 411 of the connection wiring 329 is provided in the wiring routing portion 440. Further, as shown in FIG. 15, a wiring holding member 453 of the connection wiring 329 is also provided on the back surface 542 side of the wiring cover 450. The wiring holding members 411 and 453 are preferably elastic materials such as sponges, and the connection wiring 329 is sandwiched by the wiring holding members 411 and 453 as the wiring cover 450 is attached to the wiring routing portion 440. One of the wiring holding members 411 and 453 may be omitted. As a more preferable embodiment, a heat insulating material 454 as a measure against dew condensation is provided on the back surface 452 side of the wiring cover 450.

With reference to FIG. 16, in the wiring routing portion 440, both ends 451 of the wiring cover 450 are formed by the electrical component box cover 321a of the first electrical component box 321 and the electrical component box cover 322a of the second electrical component box 322. Hold down. More airtightness.

As described above, according to the third embodiment, in the outdoor unit of the air conditioner in which the electrical component box is divided into the first electrical component box and the second electrical component box with the center pillar sandwiched between them. The connection wiring that is hung between the electrical equipment boxes can be passed through the front side of the center pillar, and the side frame on the side facing the center pillar of each electrical equipment box is formed with a drawer for the connection wiring. It is possible to obtain a highly airtight electrical component box that can prevent the infiltration of such substances and the spread of fire outside the machine.

1 Outdoor unit 10 Housing 20 Blower room 210 Blower 220 Fan guard 30 Machine room 30a Front of machine room 310 (311 to 314) Service panel 320 Electrical equipment box 321 1st electrical equipment box 321a 1st electrical equipment box cover 322 2nd Electrical equipment box 322a 2nd electrical equipment box cover 329 Connection wiring 330 Drawer part 331,332 Notch groove 350 Heat source part (compressor)
351 1st heat source part (1st compressor)
352 Second heat source section (second compressor)
40 Center pillar 40F Front part 40L Left side part 40R Right side part 411,453 Wiring holding member 440 Wiring routing part 450 Wiring cover 50 Control part 511,512 Inverter board 521,522 Fan driver board 531,532 Smoothing circuit board 54 Heat sink 6,7 Hinge 6U, 7U Upper hinge 6L, 7L Lower hinge 60a, 70a fulcrum position 61, 63, 71, 73 Male hinge part 62, 64, 72, 74 Female hinge part 612, 632, 712,732 Boss (rotary shaft)
622,642,722,742 Bearing holes

Claims (4)

A blower room in which at least two blowers, a first blower fan and a second blower fan, are arranged side by side in the upper part, a refrigerant circuit including a compressor and a heat exchanger in the lower part, and at least the compressor and the blower fan. It is equipped with a housing partitioned in the machine room where the electrical equipment box containing the control unit that controls the operation of the
On the windward side of the blower fan that is operated during the operation of one fan that operates only one of the above two blower fans, the heat generating parts that need to be cooled are collectively arranged in the control unit. An outdoor unit of an air conditioner featuring. The electrical component box is composed of a first electrical component box on the wind side of the first blower fan and a second electrical component box on the wind side of the second blower fan, and the second blower is operated during operation of one fan. The outdoor unit of the air conditioner according to claim 1, wherein a second electrical component box containing the heat generating parts is arranged on the wind side of the fan. Claim 1 or claim 1, wherein a support column for supporting the blower room is erected in the machine room, and the support column is arranged between the first electrical component box and the second electrical component box. The outdoor unit of the air conditioner according to 2. In the second electrical component box, an air flow path is formed in which the air in the machine chamber flows from the lower side to the upper side, and along the substrate surface in the second electrical component box with the operation of the second blower fan. The outdoor unit of the air conditioner according to claim 2 or 3, wherein air flows from the lower side to the upper side.

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