WO2016088748A1

WO2016088748A1 - Outdoor unit for refrigeration cycle device

Info

Publication number: WO2016088748A1
Application number: PCT/JP2015/083725
Authority: WO
Inventors: 啓浩鈴木; 祐輔田島; 浩一小谷
Original assignee: 東芝キヤリア株式会社
Priority date: 2014-12-05
Filing date: 2015-12-01
Publication date: 2016-06-09
Also published as: JP6298542B2; CN106716022B; CN106716022A; JPWO2016088748A1

Abstract

Provided is an outdoor unit for a refrigeration cycle device, wherein the unit has a housing, the inside of the housing is divided in the vertical direction into a heat-exchange chamber and a mechanical chamber by a partition plate, a heat exchanger and a blower are disposed in the heat-exchange chamber, and a compressor and an electrical component unit are disposed in the mechanical chamber. The partition plate is provided with: communication holes that enable communication between the mechanical chamber and the heat-exchange chamber which divide the interior of the housing in the vertical direction; and a duct that covers the heat-exchange chamber side of the communication holes. The duct is formed so that the center portion thereof in the vertical direction protrudes further towards the opposite side of the mechanical chamber than both end portions of the duct in the vertical direction.

Description

Outdoor unit of refrigeration cycle equipment

The present invention relates to an outdoor unit of a refrigeration cycle apparatus, and more particularly to a cooling structure for electrical components provided in the outdoor unit.

The outdoor unit of the refrigeration cycle apparatus is partitioned by a partition plate into a machine room in which a compressor, a four-way valve and the like are arranged, and a heat exchange room in which a heat exchanger and a blower fan are arranged. Among them, an electrical component unit for driving and controlling the compressor and the blower fan is disposed in the machine room. The electrical components of the electrical component unit generate heat as the compressor and the blower fan are driven, and the electrical components are cooled using a heat sink or the like in order to prevent failure or malfunction of the electrical components due to the generated heat.

In general, the outdoor unit of the management cycle apparatus is preferred to have a smaller casing size when the maximum operating capacity (kW) is the same, and when the casing size is the same, the maximum operating capacity (kW) is higher. Larger ones are preferred. If the housing size is reduced, the heat generated from the electrical components is easily generated in the machine room, and if the maximum operating capacity is increased, the amount of heat generated by the electrical components that drive and control them increases as the compressor and the blower become larger. In any case, it is necessary to efficiently cool the electrical component. In recent years, it is known that the electrical component is cooled using a part of the refrigerant in the refrigeration cycle or the electrical component is cooled using a heat pipe. (For example, refer to Patent Document 1).

JP 2012-132737 A

However, for example, as described in Patent Document 1, a part that uses a part of the refrigerant in the refrigeration cycle or cools an electrical component using a heat pipe has a complicated structure and a high cost. End up.

Embodiments of the present invention have been made in view of the above problems, and an object of the present invention is to provide an outdoor unit of a refrigeration cycle apparatus that can efficiently cool electrical components while suppressing an increase in cost. .

An outdoor unit of a refrigeration cycle apparatus according to an embodiment of the present invention provided to solve the above problems includes a housing, a partition plate inside the housing, a heat exchange chamber, and a machine room in a vertical direction. An outdoor unit of a refrigeration cycle apparatus in which a heat exchanger and a blower are disposed in the heat exchange chamber, and a compressor and an electrical component unit are disposed in the machine room,
The partition plate is provided with a communication hole that communicates the machine room and the heat exchange chamber that are partitioned in the vertical direction inside the housing, and further provided with a duct that covers the heat exchange chamber side of the communication hole,
The duct is characterized in that an intermediate portion in the vertical direction is formed so as to protrude to the opposite side of the machine room from both upper and lower end portions.
Moreover, it is desirable that the duct is integrally provided with a lead wire guide for holding the lead wire of the blower at both ends in the vertical direction.
Furthermore, according to a more detailed embodiment, the outdoor unit of the refrigeration cycle apparatus includes a housing composed of a bottom panel, a front panel, a back panel, and left and right side panels, and a heat exchanger and a blower inside the housing. A partition plate that is vertically partitioned into a heat exchange chamber in which the compressor and the electrical component unit are disposed, and at least one provided between the heat exchange and the front panel An outdoor unit of a refrigeration cycle apparatus provided with a blower, wherein the partition plate is formed with a communication hole that communicates the machine chamber and the heat exchange chamber that are partitioned in the vertical direction inside the housing, and In addition, a duct is provided to cover the heat exchange chamber side of the previous communication hole provided in the partition plate, and the duct is formed such that an intermediate portion in the vertical direction protrudes toward the heat exchange chamber side from both upper and lower end portions. Features.

According to the outdoor unit of the refrigeration cycle apparatus of the present invention having the above-described features, it is possible to provide an outdoor unit of a refrigeration cycle apparatus that can efficiently cool electrical components while improving the prior art and suppressing an increase in cost. be able to.
Further features of the present invention and effects based thereon will become apparent from the following description with reference to the accompanying drawings.

These are the perspective views of the outdoor unit of the refrigerating-cycle apparatus concerning the 1st Embodiment of this invention. FIG. 2 is an exploded perspective view of an outdoor unit of the refrigeration cycle apparatus according to the embodiment shown in FIG. 1. These are front views which show the state which removed some components of the outdoor unit of the refrigerating-cycle apparatus concerning the embodiment. These are exploded perspective views of the electrical component unit of the outdoor unit of the refrigeration cycle apparatus according to the embodiment. These are the perspective views of the duct of the outdoor unit of the refrigerating cycle device concerning the embodiment, and the inside (5A) is the perspective view which looked at the duct from the machine room 2B side, and (5B) looked at the duct from the heat exchange room side. FIG. These are front views which show the state which removed some components of the outdoor unit of the refrigerating-cycle apparatus concerning the 2nd Embodiment of this invention.

Hereinafter, embodiments for carrying out the invention will be described.
(First embodiment)
The outdoor unit of the refrigeration cycle apparatus according to the first embodiment of the present invention will be described with reference to FIGS. In the following description, terms indicating directions, such as vertical and horizontal, up and down, left and right, are used based on the illustrated state or the installed state.

In FIG. 1, an outdoor unit 1 (hereinafter simply referred to as an outdoor unit 1) of a refrigeration cycle apparatus according to the first embodiment includes a bottom panel 3 constituting a bottom surface, a front panel 4 constituting a front surface, a front panel 4 and the like. Service panel 5 constituting the front, right side panel 6 constituting the right side and part of the back side, left side panel 7 comprising a plurality of air inlets and constituting the left side, and top panel 8 constituting the ceiling surface The housing 2 is configured by the above.

The bottom panel 3 has a rectangular shape in plan view, and a folded portion 3a (FIG. 2) is provided along the periphery. On the lower surface of the bottom panel 3, two left and

right leg members

9, 9 are attached in parallel to the width direction of the outdoor unit 1. The

leg members

9 and 9 support the outdoor unit 1 and fix the outdoor unit 1 at the installation location.

The top panel 8 has a rectangular shape substantially the same as the bottom panel 3 in plan view, and is provided with a folded portion 8a (FIG. 2) along the periphery.

As shown in FIG. 2, an L-shaped heat exchanger 10 is arranged in a plan view from the back surface to the left side surface of the outdoor unit 1. The heat exchanger 10 is, for example, a fin tube type heat exchanger, and its long side portion 10 a constitutes the back surface of the housing 2 together with the right side panel 6, and the short side portion 10 b faces the inside of the left side panel 7. To be arranged.

In the outdoor unit 1, a partition plate 12 extending from the bottom panel 3 to the top panel 8 is provided. By this partition plate 12, the inside of the housing 2 is partitioned into a heat exchange chamber 2A and a machine chamber 2B.

In the heat exchange chamber 2A, two

blowers

11A and 11B are arranged vertically between the heat exchanger 10 and the front panel 4. The upper side is the blower 11A, and the lower side is the blower 11B. Each of the

blowers

11A and 11B includes a fan motor 11a and a blower fan 11b attached to the rotation shaft of the fan motor 11a. The

blowers

11A and 11B are supported by a motor base 13 that stands upright in the heat exchange chamber 2A. The lower side of the motor base 13 is fixed to the bottom panel 3, and the upper side is fixed to the upper end of the front panel 4.

The front panel 4 is provided with two

air outlets

41A and 41B.

Blowers

11A and 11B are arranged to face the

air outlets

41A and 41B, respectively. On the front panel 4,

bell mouths

42A and 42B are provided integrally with the

air outlets

41A and 41B, respectively, inside the heat exchange chamber 2A of the

air outlets

41A and 41B.

Fan guards

43A and 43B that cover the

air outlets

41A and 41B are attached to the outside of the front panel 4.

In the machine room 2B, refrigeration cycle components such as the compressor 14, the four-way valve 15, the accumulator 16, and the electrical component unit 20 are accommodated. 2 and 3, the compressor 13 is covered with a soundproof material.

The front of the machine room 2B is covered with a service panel 5 that is detachably attached. The right side surface and the back surface of the machine room 2B are covered with the right side panel 6, and an outside air introduction part 6a for taking outside air into the machine room 2B is provided near the back surface below the right side panel 6. The outside air introduction portion 6a is provided in a louver shape having a plurality of horizontally long slits.

The electrical component unit 20 is disposed on the front side of the machine room 2B. The electrical component unit 20 is disposed across the partition plate 12 and the right side panel 6 and is disposed at an intermediate position in the vertical direction of the machine room 2B.

FIG. 4 is a perspective view showing details of the electrical component unit 20. The electrical component unit 20 includes a frame 21 made of sheet metal, and the control board 30 on which various electrical components are mounted is accommodated in the frame 21. The control board 30 is surrounded by the upper surface, back surface, left side surface, and right side surface of the frame 21.

A heat sink 31 is attached to the inverter circuit portion mounted on the control board 30. The inverter circuit is for driving the compressor 13 and the fans 11 A and 11 B, and is a component that generates an extremely large amount of heat in the electrical component unit 20.
The length dimension of the heat sink 31 in the longitudinal direction is provided substantially the same as the length dimension of the control board 30 in the vertical direction. The heat sink 31 has a plurality of radiating fins 31a, and these radiating fins 31a are provided in parallel in the vertical direction with a predetermined gap. The heat sink 31 is disposed on the front side of the electrical component unit 20 and on the partition plate 12 side, that is, on the left front side of the electrical component unit 20.

The front side, the right side, and the bottom side of the heat sink 31 are covered with a heat sink duct 22 made of sheet metal.
The heat sink duct 22 is provided with a front air supply portion 24 that is a vertically long hole in a portion facing the front right side of the heat sink 31, and an internal air supply that is a vertically long hole in a portion facing the right side surface of the heat sink 31. A portion 25 is provided.

A shielding plate 23 made of sheet metal is attached adjacent to the heat sink duct 22 on the front right side of the electrical component unit 20. The shielding plate 23 has a front surface, a right side surface, and a bottom surface. At the end of the right side surface of the shielding plate 23, two hooking

holes

23a, 23a are provided with a predetermined interval in the vertical direction. On the right side surface of the frame 21, two hooking

claws

21a and 21a that engage with the hooking

holes

23a and 23a are provided. With this engageable configuration, the shielding plate 23 is attached to the frame 21 so as to be freely opened and closed.

A space S1 is formed in the electrical component unit 20 by the frame 21, the heat sink duct 22, and the shielding plate 23. The control board 30 is disposed in the space S1. On the front side of the electrical component unit 20, a terminal block 32 to which an electric wire for electrically connecting the outdoor unit 1 and the indoor unit (not shown) is connected is attached below the space S1.

As shown by a dotted line in FIG. 4, on the right side of the back surface of the frame 21, a back air supply unit 26 composed of a plurality of vertically long slots is provided. On the other hand, on the left side surface of the frame 21, an exhaust portion 27 formed of a vertically long slot is provided.

In the electrical component unit 20, a first air flow passage 28 that passes through the rear air supply portion 26, the space S 1, the internal air supply portion 25, the heat sink duct 22, and the exhaust portion 27 is formed. Further, a second air flow passage 29 that passes through the front air supply unit 24, the heat sink duct 22, and the exhaust unit 27 is formed. The first air flow passage 28 and the second air flow passage 29 merge in the heat sink duct 22.

As shown in FIG. 2, a communication hole 12 a which is a vertically long hole is provided at the attachment position of the electrical component unit 20 of the partition plate 12. When the electrical component unit 20 is attached to the partition plate 12, the exhaust part 27 of the electrical component unit 20 and the communication hole 12a of the partition plate 12 face each other.

2 to 5, a sheet metal duct 50 is attached to the partition plate 12 on the heat exchange chamber 2A side so as to cover the communication hole 12a.

FIG. 5 (5A) is a perspective view of the duct 50 viewed from the machine room 2B side, and FIG. 5 (5B) is a perspective view of the duct 50 viewed from the heat exchange chamber 2A side.
The duct 50 has a front side surface 50c and a back side surface 50d having a substantially isosceles trapezoidal shape (hereinafter simply referred to as a trapezoid) with the upper base on the

blower

11A, 11B side and the lower bottom on the partition plate 12 side. In the duct 50, a surface constituting the upper bottom portion of the trapezoid formed between the front side surface 50c and the back side surface 50d is an upper bottom surface 50a, and a surface constituting the lower low portion is a lower bottom surface 50b. Here, substantially the entire bottom surface 50b is opened. Of the surfaces constituting the two trapezoidal leg portions, the upper surface is the upper inclined surface 50e, and the lower surface is the lower inclined surface 50f.

With the above-described configuration, the duct 50 is formed such that the intermediate portion protrudes from the opposite ends to the opposite side of the machine room 2B, that is, the heat exchange chamber side. A space S 2 is formed between the partition plate 12 and the duct 50 by attaching the lower bottom surface 50 b side of the duct 50 in close contact with the partition plate 12.

A series of exhaust holes 51 are provided on the upper bottom surface 50a, the upper slope 50e, and the lower slope 50f of the duct 50 near the rear side face 50d. Since the exhaust hole 51 is formed over three surfaces of the upper bottom surface 50a, the upper slope 50e, and the lower slope 50f, the opening area can be increased.

Since the opening area of the exhaust hole 51 is increased, rainwater that enters the heat exchange chamber 2 A easily enters the duct 50 through the exhaust hole 51. Therefore, a baffle plate 51a that prevents intrusion of rainwater is provided inside the exhaust hole 51 (space S2 side). The baffle plate 51 a is formed by bending inward from the opening end portion on the front side of the exhaust hole 51. Furthermore, since the position of the exhaust hole 51 in the depth direction is closer to the back side than the position of the communication hole 12a of the partition plate 12, even if rainwater enters the duct 50, the electrical equipment is directly connected through the communication hole 12a. The product unit 20 does not enter.
Further, the duct 50 has an upper slope 50e and a lower slope 50f, and these slopes function as a rectifying plate, and regulate the airflow in the vicinity of the duct 50.

In FIG. 5, an upper fixing piece 52 and a lower fixing piece 53 are provided at the end of the duct 50 in the vertical direction, and the duct 50 is fixed to the partition plate 12 via these fixing

pieces

52 and 53. Further, the upper fixed piece 52 is integrally provided with an upper lead wire guide 52a, and the lower fixed piece 53 is integrally provided with a lower lead wire guide 53a.
A part of the lead wire 11c extending from the fan motor 11a of the upper blower 11A is held by the upper lead wire guide 52a and guided to the electrical component unit 20.
On the other hand, a part of the lead wire 11c extending from the fan motor 11a of the lower blower 11B is held by the lower lead wire guide 53a and guided to the electrical component unit 20.

With the above configuration, since the lead wire guides 52a and 53a are integrally provided in the duct 50, the number of parts can be reduced, and the assembly work and the lead wire 11c can be easily routed.

Further, the peripheral end portion of the upper lead wire guide 52a is subjected to hemming (bending) so that the lead wire is not damaged at the end portion of the sheet metal.
On the other hand, a binding band fixing piece 53b is provided at the peripheral end of the lower lead wire guide 53a instead of being hemmed, and a part of the lead wire 11c is fixed to the binding band fixing piece 53b using a binding band. It can be done. By fixing a part of the lead wire 11c to the binding band fixing piece 53b, it is possible to prevent rubbing between the lead wire 11c and the end of the lower lead wire guide 53a due to vibration during transportation or operation. Even if hemming is not performed, damage to the lead wire 11c can be prevented.
Further, since the shapes of the lead wire guides 52a and 53a are different from each other, it becomes easy for an assembly operator to recognize the vertical direction of the duct 50, and an attachment error during the assembly operation can be prevented.

In the outdoor unit 1 configured as described above, when an instruction to start the refrigeration cycle operation is input from the indoor unit side, a necessary control signal is sent from the electrical component unit 20 to the electric parts such as the compressor 13 and the blower 11. While the compressor 13 is driven, the

fans

11A and 11B start blowing. The outside air is sucked into the heat exchange chamber 2A and flows through the heat exchanger 10, and after exchanging heat with the refrigerant guided to the heat exchanger 10 as the compressor 13 is driven, the

bell mouths

42A and 42B on the front panel 4 and It blows off to the front side of the outdoor unit 1 through the

fan guards

43A and 43B.

While the heat exchange chamber 2A and the machine room 2B communicate with each other through the duct 50, the communication hole 12a of the partition plate 12 and the electrical component unit 20, the heat exchange chamber 2A is negatively pressured by the blowing action of the

blowers

11A and 11B. The air in the machine room 2B is discharged to the heat exchange room 2A side. Accordingly, outside air flows into the machine room 2B from the outside air introduction portion 6a provided below the right side panel 6.

The outside air that has flowed into the machine room 2 B from the outside air introduction unit 6 a passes through the two

air flow passages

28 and 29 formed in the electrical component unit 20.
First, a state where air flows through the first air flow passage 28 will be described. Part of the air in the machine room 2 B flows into the space S 1 of the electrical component unit 20 through the back surface air supply unit 26 of the electrical component unit 20. The air flowing into the space S 1 cools the control board 30 when passing through the control board 30, and flows into the heat sink duct 22 through the internal air supply unit 25. The air that flows into the heat sink duct 22 cools the heat sink 31 and is discharged from the exhaust unit 27 of the frame 21 to the outside of the electrical component unit 20.

Next, a state where air flows through the second air flow passage 29 will be described. Part of the air in the machine room 2 B flows into the heat sink duct 22 through the front air supply unit 24 of the electrical component unit 20. The air that has flowed into the heat sink duct 22 merges with the air flowing through the first air flow passage 28 in the heat sink duct 22 to cool the heat sink 31 and is discharged out of the electrical component unit 20 from the exhaust portion 27 of the frame 21.

As described above, when the outside air introduced into the machine room 2B passes through the two

air flow passages

28 and 29, the control board 30 and the heat sink 31 are cooled to increase the temperature of the electrical components in the electrical component unit 20. suppress.

Further, the duct 50 for discharging the air in the machine room 2B to the heat exchange chamber 2A has a substantially isosceles trapezoidal shape with an intermediate portion protruding to the opposite side of the machine room 2B. And the air in the machine room 2B can be efficiently discharged to the heat exchange chamber 2A side. As a result, heat is less likely to be generated in the machine room 2B and the electrical component unit 20, so that stable operation is possible even under conditions of, for example, an outside air temperature of 40 ° C. to 50 ° C. or even higher temperatures.

(Second Embodiment)
FIG. 6 is an exploded front view of the outdoor unit of the refrigeration cycle apparatus according to the second embodiment of the present invention.
About each part of this 2nd Embodiment, the part same as each part of the outdoor unit of 1st Embodiment is shown with the same code | symbol, and the detail of description is abbreviate | omitted. The second embodiment is different from the first embodiment in that it does not include two

blowers

11A and 11B but includes one blower 11C.

The outdoor unit 100 according to the second embodiment has a maximum operating capacity (kW) set lower than the outdoor unit 1 of the first embodiment, and the height dimension of the heat exchanger 10 and the outdoor unit 100 Small height dimension. Therefore, one blower 11C is provided.

The configurations of the electrical component unit 20 and the duct 50 are the same as those in the first embodiment, and in the second embodiment as well, the air in the machine room 2B is efficiently heated as in the first embodiment. It can exhaust to the exchange chamber 2A side. The lead wire 11c (not shown) of the fan motor 11a of the blower 11C is guided to the electrical component unit 20 via the lower lead wire guide 53b.

According to the embodiment described above, the heat generated in the machine room can be efficiently discharged to the heat exchange chamber side.

The present invention is not limited to the above embodiment, and various modifications are possible. In the duct 50 used in the first and second embodiments, the front side surface 50c and the back side surface 50d have a substantially isosceles trapezoidal shape, but the middle portion projects to the opposite side of the machine room. If present, a triangular shape, an arc shape, or a trumpet shape gradually reducing from the lower bottom surface 50b toward the upper bottom surface 50a may be used.

The preferred embodiments of the present invention have been described above, but the above-described embodiments are presented as examples, and the present invention is not intended to limit the scope of the described embodiments. The present invention can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1,100 ... Outdoor unit, 6a ... Outside air introduction part, 11 ... Blower, 12 ... Partition plate, 12a ... Communication hole, 20 ... Electrical component unit, 21 ... Frame, 22 ... Heat sink duct, 23 ... Shielding plate, 24 ... Front Air supply unit 25 ... Internal air supply unit 26 ... Back side air supply unit 27 ... Exhaust unit 28 ... First air flow passage 29 ... Second air flow passage 30 ... Control board 31 ... Heat sink 50 ... Duct, 51 ... exhaust hole.

Claims

The housing and the inside of the housing are partitioned into a heat exchange chamber and a machine room in the vertical direction by a partition plate. A heat exchanger and a blower are arranged in the heat exchange chamber, and a compression is placed in the machine room. An outdoor unit of a refrigeration cycle apparatus in which a machine and an electrical component unit are arranged,
The partition plate is provided with a communication hole that communicates the machine room and the heat exchange chamber that are partitioned in the vertical direction inside the housing, and further provided with a duct that covers the heat exchange chamber side of the communication hole,
The outdoor unit of the refrigeration cycle apparatus, wherein the duct is formed such that an intermediate portion in the vertical direction protrudes to the opposite side of the machine room from both upper and lower end portions.
The outdoor unit of the refrigeration cycle apparatus according to claim 1, wherein the duct is integrally provided with a lead wire guide for holding the lead wire of the blower at both ends in the vertical direction.
A chassis composed of a bottom panel, a front panel, a back panel, left and right side panels;
A partition plate that divides the inside of the casing in a vertical direction into a heat exchange chamber in which a heat exchanger and a blower are arranged, and a machine room in which a compressor and an electrical component unit are arranged;
An outdoor unit of a refrigeration cycle apparatus comprising at least one blower provided between the heat exchange and the front panel,
The partition plate is formed with a communication hole that communicates the machine room and the heat exchange chamber that are partitioned in the vertical direction inside the housing, and further, the heat exchange chamber side of the previous communication hole provided in the partition plate An outdoor unit for a refrigeration cycle apparatus, wherein a covering duct is provided, and the duct is formed such that an intermediate portion in the vertical direction protrudes toward the heat exchange chamber from both upper and lower ends.