WO2017158707A1

WO2017158707A1 - Outdoor unit for air conditioner

Info

Publication number: WO2017158707A1
Application number: PCT/JP2016/058044
Authority: WO
Inventors: 慎一郎浦; 智之 ▲高▼木
Original assignee: 三菱電機株式会社
Priority date: 2016-03-14
Filing date: 2016-03-14
Publication date: 2017-09-21
Also published as: JP6513284B2; JPWO2017158707A1; CN207019199U

Abstract

In an outdoor unit (1) for an air conditioner, a fan (4), a compressor (3), and electrical component box (5) are accommodated within a housing (20). An electrical board (6) is accommodated within the electrical component box (5). The inside of the housing (20) is divided by a partition section (23) into a fan chamber (21) in which the fan (4) is accommodated and into a machine chamber (22) in which the compressor (3) is accommodated. The electrical component box (5) has a horizontal section (5a) which is provided above the compressor (3), and a vertical section (5b) which extends downward from the horizontal section (5a). The electrical board (6) has a horizontal board section (6a) which is accommodated within the horizontal section (5a), a vertical board section (6b) which is accommodated within the vertical section (5b), and a connection section which electrically connects the horizontal board section (6a) and the vertical board section (6b). The partition section (23) is constituted by: a partition wall (2) extending from the bottom surface (20a) of the housing (20) and having a height not reaching the top surface (20b) of the housing (20); and a vertical section (5b) for closing between the partition wall (2) and the top surface (20b).

Description

Air conditioner outdoor unit

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

The interior of the outdoor unit of the air conditioner is divided into a fan room in which a fan is mounted and a machine room in which a compressor is mounted. In the outdoor unit, the fan chamber and the machine room may be partitioned by a partition wall and an electrical component box provided thereon. The electrical component box is a box for storing an electrical board having electronic components mounted on a mounting surface, and is generally molded from resin.

In Patent Document 1, the electrical component box is provided inside the outdoor unit in the form of so-called flat placement, which is provided on the partition wall with the mounting surface of the electric board being horizontal. In the flat type, the end of the electrical component box is located above the partition, and the other part is housed in the machine room and located above the compressor. That is, most of the electrical component box is housed in the machine room.

Separately, an electrical component box may be provided inside the outdoor unit in the form of vertical installation. In the vertical installation type, a partition wall is provided from the bottom surface of the outdoor unit to the top surface, and the fan chamber and the machine room are partitioned by the partition wall. Further, in the vertical installation type, the electrical component box is attached to the partition wall in a state where the mounting surface of the electric substrate and the partition wall are parallel, that is, the mounting surface of the electric substrate is vertical.

JP 2005-133996 A

However, in the flat type, the fan room and the machine room are partitioned by the electrical component box and the partition, so that when the electrical component box is made thin, no gap is generated between the electrical component box and the partition. In addition, it is necessary to widen the partition area by reducing the thickness of the electrical component box. Therefore, the material cost corresponding to the increased area of the partition wall increases. As the material cost increases, the manufacturing cost of the outdoor unit increases. Moreover, since the electrical component box is larger in the horizontal direction than in the vertical direction, the machine room is increased in size. As the machine room becomes larger, the outdoor unit becomes larger. As the outdoor unit becomes larger, the installation space for the outdoor unit is limited.

In addition, in the vertical installation type, since the partition wall is provided from the bottom surface to the top surface, the material cost increases. As the material cost increases, the manufacturing cost of the outdoor unit increases. In addition, the space above the compressor in which the electrical component box is stored in the flat placement format becomes a useless space.

The present invention has been made in view of the above, and an object of the present invention is to obtain an outdoor unit of an air conditioner that can reduce the manufacturing cost and reduce the size of the apparatus.

In order to solve the above-described problems and achieve the object, an outdoor unit of an air conditioner according to the present invention includes a housing, a fan housed in the housing, and a compression housed in the housing. Machine, electrical component box housed inside the housing, electric board housed inside the electrical component box, machine housing the fan chamber and the compressor inside the housing A partition section partitioned into chambers. The electrical component box has a horizontal portion provided above the compressor inside the machine room, and a vertical portion extending downward from the horizontal portion. The electric board is a horizontal board part that is stored in a horizontal part with a mounting surface on which electronic components are mounted, a vertical board part that is stored in a vertical part with a mounting surface on which electronic parts are mounted vertically, A connecting portion for electrically connecting the wiring layer of the horizontal substrate portion and the wiring layer of the vertical substrate portion; A partition part is comprised by the partition part extended from the bottom face of the housing | casing and formed in the height which does not reach a top surface, and the perpendicular | vertical part of the electrical component box which block | closes between a partition and a top surface.

The outdoor unit of an air conditioner according to the present invention has an effect that the manufacturing cost can be reduced and the size of the apparatus can be reduced.

The front view of the outdoor unit of the air conditioner concerning Embodiment 1 of this invention Plan view of electric substrate in Embodiment 1 Sectional drawing of the electrical component box which accommodated the electric substrate in Embodiment 1 The front view of the outdoor unit of the air conditioner concerning Embodiment 2 of this invention Sectional drawing of the electrical component box which accommodated the electric substrate in Embodiment 2 Plan view of components according to Embodiment 2 The perspective view of the structural member in Embodiment 2. FIG. The figure explaining the process which fixes a heat sink to refrigerant | coolant piping in Embodiment 2. The figure explaining the process which fixes a heat sink to refrigerant | coolant piping in Embodiment 2. The figure explaining the process which fixes a heat sink to refrigerant | coolant piping in Embodiment 2. The front view of the outdoor unit of the air conditioner concerning the modification of Embodiment 2

Hereinafter, an outdoor unit of an air conditioner according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a front view of an outdoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention. In FIG. 1, in order to show the internal structure of the outdoor unit 1 of an air conditioner, it has shown in the state which permeate | transmitted the panel which block | closes a front surface. In the following description, the outdoor unit 1 of the air conditioner is also simply referred to as the outdoor unit 1. The outdoor unit 1 is an outdoor unit of an air conditioner that cools or heats a room in cooperation with an indoor unit (not shown).

The outdoor unit 1 includes a housing 20 that is an outer shell, a fan 4 that is housed in the housing 20 and generates an airflow when rotating, and a compressor that is housed in the housing 20 and compresses refrigerant. 3. The outdoor unit 1 includes an electrical component box 5 housed in the housing 20 and an electric board 6 that is housed in the electrical component box 5 and constitutes an inverter circuit that drives and controls the compressor 3 and the fan 4. With.

The interior of the housing 20 is partitioned into a fan chamber 21 in which the fan 4 is stored and a machine chamber 22 in which the compressor 3 is stored. A partition 23 that divides the interior of the housing 20 into a fan chamber 21 and a machine chamber 22 includes a partition wall 2 extending from the bottom surface 20 a of the housing 20 toward the top surface 20 b and a part of the electrical component box 5. The The detailed configuration of the partition unit 23 will be described later.

The electrical component box 5 has a horizontal part 5a provided above the compressor 3 inside the machine room 22 and a vertical part 5b extending downward from the horizontal part 5a, and has an L-shaped cross section as a whole. .

The electric board 6 has the mounting surface 16a on which the electronic component 8 is mounted horizontally and the horizontal board portion 6a stored in the horizontal portion 5a of the electrical component box 5 and the mounting surface 16b on which the electronic component 8 is mounted. And a vertical substrate portion 6b accommodated in the vertical portion 5b of the electrical component box 5.

FIG. 2 is a plan view of the electric board 6 in the first embodiment. As shown in FIG. 2, the electric substrate 6 may be composed of a single substrate in which a horizontal substrate portion 6 a and a vertical substrate portion 6 b are connected. The electric substrate 6 shown in FIG. 2 is divided into two substrates, that is, a horizontal substrate portion 6a and a vertical substrate portion 6b by dividing the electric substrate 6 by an electric substrate dividing slit 7 formed on one substrate. Instead of the electric substrate dividing slit 7, an electric substrate 6 that can be divided by forming a V-shaped groove or perforation may be used. Moreover, it is good also as the electric board | substrate 6 divided | segmented into the horizontal board | substrate part 6a and the vertical board | substrate part 6b from the beginning.

The electrical board 6 is provided with a connection jumper 9 which is a connection part for electrically connecting the wiring layer of the horizontal board part 6a and the wiring layer of the vertical board part 6b. Thereby, the electronic component 8 mounted on the mounting surface 16a and the electronic component 8 mounted on the mounting surface 16b maintain electrical connection via the wiring layer and the connection jumper 9 even after the electric substrate 6 is divided. be able to.

FIG. 3 is a cross-sectional view of the electrical component box 5 in which the electrical board 6 is accommodated in the first embodiment. The electronic component 8 mounted on the mounting surface 16b of the vertical board portion 6b housed in the vertical portion 5b of the electrical component box 5 is exposed to the outside through the opening 24 formed on the fan chamber 21 side of the vertical portion 5b. .

Next, the partition unit 23 that partitions the inside of the housing 20 will be described. As described above, the partition portion 23 includes the partition wall 2 extending from the bottom surface 20 a of the housing 20 toward the top surface 20 b and a part of the electrical component box 5.

Here, the partition wall 2 extends from the bottom surface 20a of the housing 20 toward the top surface 20b, but is formed at a height that does not reach the top surface 20b of the housing 20. Therefore, an opening that allows the fan chamber 21 and the machine chamber 22 to communicate with each other is formed between the upper end 2 a of the partition wall 2 and the top surface 20 b of the housing 20. The opening between the upper end 2 a of the partition wall 2 and the top surface 20 b of the housing 20 is closed by the vertical portion 5 b of the electrical component box 5. Thus, the inside of the housing 20 is partitioned into the fan chamber 21 and the machine chamber 22 by the partition wall 2 and the vertical portion 6b.

By arranging the electrical component box 5 in this manner, the electronic component 8 mounted on the mounting surface 16b of the vertical substrate portion 6b is exposed to the fan chamber 21, as shown in FIG. Therefore, the electronic component 8 mounted on the mounting surface 16b can be cooled by the airflow generated when the fan 4 rotates. Here, if the heat sink 10 is attached to the electronic component 8 as shown in FIG. 1, the cooling efficiency of the electronic component 8 mounted on the mounting surface 16b can be further improved. If the heat sink 10 is attached to the electronic component 8, it is possible to cool the electronic component 8 without exposing the electronic component 8 to the fan chamber 21 and exposing only the heat sink 10 to the fan chamber 21. Become.

The electronic component 8 mounted on the mounting surface 16a and the mounting surface 16b includes an inverter module and a diode bridge that are likely to become hot during operation. Therefore, among the electronic components 8, the inverter module and the diode bridge, which are likely to become hot during operation, are mounted on the mounting surface 16 b and exposed to the fan chamber 21, and further the heat sink 10 is attached, so that the temperature easily rises. The temperature rise of the electronic component 8 can be suppressed. By suppressing the temperature rise, the operational stability and reliability of the electronic component 8 can be improved.

Moreover, since the vertical part 5b of the L-shaped electrical component box 5 is incorporated in a part of the partition part 23, the ratio of the partition wall occupied in the partition part 23 can be reduced. In other words, the area of the partition wall 2 can be reduced. By reducing the area of the partition wall 2, the material cost can be reduced and the manufacturing cost can be suppressed.

Here, when the entire electrical component box having a planar shape is stored in the machine room 22 side, the outdoor unit 1 is increased in size as the machine room 22 is increased in size. In order to block the increase in the size of the outdoor unit 1, when a part of the flat electrical component box is stored in the fan chamber 21, the ventilation resistance in the fan chamber 21 is increased, and therefore the ventilation when the fan 4 is rotated is increased. The amount of the air conditioner may be reduced, and the performance of the air conditioner may be reduced. On the other hand, in the outdoor unit 1 of the air conditioner according to the first embodiment, since the electrical component box 5 is L-shaped, the direction in which the fan chamber 21 and the machine chamber 22 are arranged more than the planar electrical component box. The total length in can be shortened. Therefore, it is possible to reduce the size of the machine room 22 without causing the electrical component box 5 to jump out toward the fan chamber 21, thereby reducing the size of the outdoor unit 1 itself and preventing the performance of the air conditioner from being deteriorated. .

Embodiment 2. FIG.
FIG. 4 is a front view of the outdoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention. FIG. 5 is a cross-sectional view of an electrical component box that houses an electrical board in the second embodiment. In addition, in FIG. 4, in order to show the internal structure of the outdoor unit 31, it has shown in the state which permeate | transmitted the panel which block | closes a front surface. Moreover, about the structure similar to the said Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

In the second embodiment, as shown in FIGS. 4 and 5, the vertical board portion 6b is housed in the electrical component box 5 with the mounting surface 16b facing the machine room 22 side. In addition, the electronic component 8 mounted on the mounting surface 16 b is exposed to the machine room 22.

Further, a heat sink 11 is attached to the electronic component 8 mounted on the mounting surface 16b. The heat sink 11 is composed of two constituent members 11a. The heat sink 11 is fixed to the refrigerant pipe 15 with the refrigerant pipe 15 extending from the compressor 3 sandwiched between the two constituent members 11a. The refrigerant pipe 15 is generally a copper pipe.

FIG. 6 is a plan view of the constituent member 11a according to the second embodiment. FIG. 7 is a perspective view of the component member 11a according to the second embodiment. A groove 13 into which the refrigerant pipe 15 is fitted when the refrigerant pipe 15 is sandwiched is formed in the component member 11a. The component member 11a is formed with a fastening hole 12 for fastening the two component members 11a with screws.

8 to 10 are diagrams illustrating a process of fixing the heat sink 11 to the refrigerant pipe 15 in the second embodiment. As shown in FIGS. 8 and 9, the heat sink 11 is fixed to the refrigerant pipe 15 by sandwiching the refrigerant pipe 15 between the constituent members 11 a and fastening the constituent members 11 a with the screws 14 passed through the fastening holes 12. The In addition, although illustration is abbreviate | omitted, the component members 11a may be fastened together through the nut through the screw 14, or a screw thread is formed in the fastening hole 12 formed in the one component member 11a, and the fastening hole The constituent members 11 a may be fastened by screwing the screws 14 into the screws 12.

Here, the refrigerant pipe 15 to which the heat sink 11 is fixed is the refrigerant pipe after passing through the outdoor unit heat exchanger through which the cooled refrigerant passes, regardless of whether the air conditioner is in cooling operation or heating operation. 15 and so on. In addition, illustration of an outdoor unit heat exchanger is omitted.

According to the outdoor unit 31 of the air conditioner described above, the electronic component 8 can be cooled through the heat sink 11 in contact with the copper refrigerant pipe 15 having a higher heat transfer coefficient than air. Since a refrigerant having a lower temperature than the surrounding air flows inside the refrigerant pipe 15, the heat radiation efficiency from the electronic component 8 through the refrigerant pipe 15 and the heat sink 11, that is, the cooling efficiency of the electronic component 8 is improved. Can be achieved. Thereby, size reduction of the heat sink 11 can be achieved, reduction of material cost and space saving can be achieved. Further, since the space above the compressor 3 can be used as a space for providing the heat sink 11, further space saving can be achieved.

FIG. 11 is a front view of an air conditioner outdoor unit 31 according to a modification of the second embodiment. In this modification, the electronic component 8 mounted on the mounting surface 16a of the horizontal substrate portion 6a is exposed to the machine room 22. Further, the heat sink 11 attached to the electronic component 8 mounted on the mounting surface 16 a is fixed to the refrigerant pipe 15.

As in the outdoor unit 31 of the air conditioner according to the second embodiment, if the electronic component 8 is cooled by using the refrigerant pipe 15 instead of the airflow generated by the rotation of the fan 4, the electronic component 8 is used as the fan. Since it is not necessary to turn to the chamber 21, even if it is a case where the electronic component which needs cooling is mounted in the horizontal board | substrate part 6a, it can cool using the refrigerant | coolant piping 15. FIG. Therefore, it is possible to improve the degree of freedom in designing the component arrangement.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1,31 outdoor unit, 2 partition, 2a top, 3 compressor, 4 fan, 5 electrical component box, 5a horizontal part, 5b vertical part, 6 electrical board, 6a horizontal board part, 6b vertical board part, 7 electrical board division Slit, 8 electronic parts, 9 connection jumper, 10, 11 heat sink, 11a component, 12 fastening hole, 13 groove, 14 screw, 15 refrigerant piping, 16a, 16b mounting surface, 20 housing, 20a bottom surface, 20b top surface , 21 fan room, 22 machine room, 23 compartments, 24 openings.

Claims

A housing,
A fan housed in the housing;
A compressor housed in the housing;
An electrical component box housed inside the housing;
An electrical substrate housed inside the electrical component box;
A partition section that partitions the interior of the housing into a fan chamber in which the fan is stored and a machine chamber in which the compressor is stored;
The electrical component box has a horizontal part provided above the compressor inside the machine room, and a vertical part extending downward from the horizontal part,
The electric board includes a horizontal board part that is stored in the horizontal part with a mounting surface on which electronic components are mounted, and a vertical board that is stored in the vertical part with a mounting surface on which electronic parts are mounted vertically. A connecting portion for electrically connecting the wiring layer of the horizontal substrate portion and the wiring layer of the vertical substrate portion,
The partition portion includes a partition wall that extends from the bottom surface of the housing and has a height that does not reach the top surface, and the vertical portion of the electrical component box that covers the space between the partition wall and the top surface. An air conditioner outdoor unit characterized by the above.
2. The outdoor unit for an air conditioner according to claim 1, wherein the electronic component mounted on the vertical board is exposed to the fan chamber.
The outdoor unit for an air conditioner according to claim 2, further comprising a heat sink attached to the electronic component exposed in the fan chamber.
The electronic component mounted on the vertical substrate is exposed to the machine room;
The outdoor unit for an air conditioner according to claim 1, further comprising a heat sink attached to the electronic component exposed to the machine room and a refrigerant pipe extending from the compressor.
The electronic component mounted on the horizontal substrate is exposed to the machine room;
The outdoor unit for an air conditioner according to claim 1, further comprising a heat sink attached to the electronic component exposed to the machine room and a refrigerant pipe extending from the compressor.