EP4650685A1

EP4650685A1 - Outdoor unit of refrigeration cycle device

Info

Publication number: EP4650685A1
Application number: EP23915901.5A
Authority: EP
Inventors: Naoki Seto; Tatsuya ISHIMORI; Takayuki TARUI
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2025-11-19
Also published as: CN224175274U; WO2024150277A1; JP7819368B2; JPWO2024150277A1; EP4650685A4

Abstract

An object is to provide an outdoor unit of a refrigeration cycle apparatus that ensures airflow to a lower portion of a casing at which a portion of a heat exchanger is positioned even in a state of close-proximity arrangement. The outdoor unit of a refrigeration cycle apparatus is provided with a base that forms a bottom surface of the casing and a support leg and a plurality of pillars that are joined to corner portions of the base and extend in a height direction of the casing. A pillar of the plurality of pillars that is at least located at an edge of a first side surface has a lower end portion joined to the base and is provided with a first portion that has a surface parallel to the first side surface and is positioned at the edge of the first side surface in a width direction, a second portion that has a surface parallel to a second side surface adjacent to the first side surface and is positioned at an edge of the second side surface in the width direction, and a chamfer portion that is located between the first portion and the second portion and has an inclined surface. The first portion is provided with a projected portion formed at a lower end and a constricted portion positioned above the projected portion. The constricted portion is positioned closer to the heat exchanger than is the projected portion in a perpendicular direction to the first side surface.

Description

Technical Field

The present disclosure relates to an outdoor unit of a refrigeration cycle apparatus installed outdoors.

Background Art

Some outdoor unit has been known that forms a part of a refrigeration cycle apparatus, such as an air-conditioning apparatus, and is installed outdoors. An outdoor unit of an air-conditioning apparatus disclosed in Patent Literature 1 has a casing that is substantially cuboid box-shaped, a fan, and components of a refrigerant circuit, such as a compressor and a heat exchanger. The casing has a base that supports the compressor and other components, a frame that supports a propeller fan, and a pillar that supports the heat exchanger and other components. The pillar, which has a wall portion to which the heat exchanger is fixed, has a structure that does not allow air to pass through portions other than the heat exchanger when the air is drawn in. Also, the base is fixed to the pillar, has a function that drains water from the heat exchanger, and thus has a structure that covers a lower portion of the heat exchanger.

Citation List

Patent Literature

Patent Literature 1: International Publication No. 2018/011939

Summary of Invention

Technical Problem

The outdoor unit of an air-conditioning apparatus disclosed in Patent Literature 1 is structured such that its base, which covers the lower portion of the heat exchanger, reduces airflow toward the lower portion of the heat exchanger to a small amount. In particular, in the case of an air-conditioning apparatus installed at a building or another structure, a plurality of outdoor units need to be arranged in close proximity in a narrow area, such as a narrow rooftop area, and their installation area thus needs to be reduced with no large gaps specified between the casings, and as a result, the distance between adjacent outdoor units is narrow. The heat exchangers located such that they face the gap between two adjacent outdoor units allow air that flows into the gap between the outdoor units to flow in. However, the amount of air that flows into the lower portions of the heat exchangers that are positioned in proximity to the installation surface is undesirably limited by the base, which covers the lower portions of the heat exchangers.
The present disclosure is made to solve such problems, and an object of the present disclosure is to provide an outdoor unit of a refrigeration cycle apparatus that ensures airflow to a lower portion of a casing at which a portion of a heat exchanger is positioned even in a state where the outdoor units are arranged in close proximity. Solution to Problem
An outdoor unit of a refrigeration cycle apparatus according to an embodiment of the present disclosure is provided with a casing formed in a cuboid shape; a heat exchanger housed inside the casing and located along a first side surface of the casing, the first side surface comprising an opening; and an air-sending fan located at an upper portion of the casing and configured to discharge air that passes through the heat exchanger from a top surface of the casing, the outdoor unit having the casing, which has a shape in which, in an area at least from a bottom surface of the casing to an area where the heat exchanger is housed, adjacent side surfaces of the casing are joined by an inclined surface, the outdoor unit being provided with a base that forms the bottom surface of the casing and a support leg and a plurality of pillars that are joined to corner portions of the base and extend in a height direction of the casing. A pillar of the plurality of pillars that is at least located at an edge of the first side surface has a lower end portion joined to the base and is provided with a first portion that has a surface parallel to the first side surface and is positioned at the edge of the first side surface in a width direction, a second portion that has a surface parallel to a second side surface adjacent to the first side surface and is positioned at an edge of the second side surface in the width direction, and a chamfer portion that is located between the first portion and the second portion and has the inclined surface. The first portion is provided with a projected portion formed at a lower end and a constricted portion positioned above the projected portion. The constricted portion is positioned closer to the heat exchanger than is the projected portion in a perpendicular direction to the first side surface. Advantageous Effects of Invention
According to an embodiment of the present disclosure, the constricted portion is provided to the pillar so that airflow is ensured to the lower portion of the casing at which the portion of the heat exchanger is positioned even in a state where the outdoor units of a refrigeration cycle apparatus are arranged in close proximity.

Brief Description of Drawings

[Fig. 1] Fig. 1 is a perspective view that illustrates an external view of an outdoor unit 100 of a refrigeration cycle apparatus according to Embodiment 1.
[Fig. 2] Fig. 2 is a side view that illustrates a case where the outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 are arranged in close proximity.
[Fig. 3] Fig. 3 is a perspective view that illustrates a casing 1 according to Embodiment 1.
[Fig. 4] Fig. 4 is a perspective view that illustrates a bottom plate 2 of the casing 1 according to Embodiment 1.
[Fig. 5] Fig. 5 is a perspective view that illustrates a base leg 3 of the casing 1 according to Embodiment 1.
[Fig. 6] Fig. 6 is an enlarged perspective view that illustrates portion A of the outdoor unit 100 of a refrigeration cycle apparatus illustrated in Fig. 1.
[Fig. 7] Fig. 7 is a perspective view that illustrates a corner portion of a base 20 according to Embodiment 1 viewed from inside.
[Fig. 8] Fig. 8 is a perspective view that illustrates one of pillars 4 of the casing 1 according to Embodiment 1.
[Fig. 9] Fig. 9 is an explanatory diagram that illustrates a section taken along line B-B illustrated in Fig. 2.
[Fig. 10] Fig. 10 is an enlarged view that illustrates portion C illustrated in Fig. 2.
[Fig. 11] Fig. 11 is schematic views that illustrate respective gaps 90 in cases where the outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 and outdoor units 1000 of a refrigeration cycle apparatus according to a comparative example are each arranged in close proximity.

Description of Embodiments

An embodiment of the present disclosure is described below with reference to drawings. Note that the same or equivalent elements are denoted by the same reference signs in the drawings. Their descriptions are omitted or simplified as long as resultant descriptions are suited. Also, shapes, sizes, locations and other details of components illustrated in the drawings may be changed as long as resultant configurations are suited.

Embodiment 1

Fig. 1 is a perspective view that illustrates an external view of an outdoor unit 100 of a refrigeration cycle apparatus according to Embodiment 1. Fig. 2 is a side view that illustrates a case where the outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 are arranged in close proximity.
The outdoor unit 100 of a refrigeration cycle apparatus of Embodiment 1 has, as illustrated in Fig. 1 and Fig. 2, a casing 1 substantially cuboid shaped and vertically placed, a heat exchanger 7 provided along a side surface of the casing 1, and internal components that form a refrigeration cycle, such as a compressor (not illustrated) installed inside the casing 1, an air-sending fan 81, an accumulator (not illustrated), and refrigerant pipes (not illustrated).
The casing 1 is substantially cuboid and is provided with the heat exchanger 7 located along a first side surface 1a, which is an opening of the casing 1, and the air-sending fan 81 located at an upper portion of the casing 1 and configured to discharge air that passes through the heat exchanger 7. The casing 1 has a shape in which, in an area at least from the bottom surface of the casing 1 to the area where the heat exchanger 7 is housed in a z direction, adjacent side surfaces 1a and 1b of the casing 1 are joined by an inclined surface 1c. Note that the inclined surface 1c is provided at each corner portion that extends from the bottom surface to the top surface of the casing 1, which is a cuboid structure, described in Embodiment 1.
Fig. 3 is a perspective view that illustrates the casing 1 according to Embodiment 1. The casing 1 is provided with a base 20, four pillars 4, which extend upward (in the z direction) from corner portions of the base 20, a front panel 5, which covers a side surface, and a fan casing 6 provided around the air-sending fan 81. Also, the base 20, which forms the bottom portion of the casing 1, is provided with a bottom plate 2, base legs 3, which support the casing 1, and a drain pan 8. The four pillars 4 are connected to each other by the fan casing 6 at an upper portion of the casing 1. The structure illustrated in Fig. 3 is an example. The four pillars 4 only need to be connected to each other by a frame, such as the fan casing 6. Also, two pillars 4 located at both edges of the second side surface 1b of the casing 1 in the width direction are connected to each other by the front panel 5. As described above, some of the four pillars 4 may also be connected to each other by a frame.
Fig. 4 is a perspective view that illustrates the bottom plate 2 of the casing 1 according to Embodiment 1. As illustrated in Fig. 3 and Fig. 4, the bottom plate 2 is substantially rectangular shaped and forms the bottom surface of the casing 1. The bottom plate 2 is placed on and supported by the pair of base legs 3 at both edge portions between which plateau portions 2a and trough portions 2b extend and is positioned at a predetermined height from an installation surface 91. On the top surface of the bottom plate 2, internal components, such as a compressor (not illustrated), are placed. The bottom surface of the bottom plate 2 is structured by being formed with angular bends such that the plateau portions 2a and the trough portions 2b are alternately connected to each other in a corner-shaped wave. The top surfaces of the plateau portions 2a and the bottom surfaces of the trough portions 2b are each made into a flat surface and are formed substantially parallel to each other. That is, the sectional shape of the bottom surface of the bottom plate 2 may be formed in a rectangular wave shape, a trapezoidal wave shape, or another wave shape. The bottom plate 2 has the bottom surface, which is formed in a wave shape, thus has increased rigidity when a bending moment is applied toward its surface, and consequently has increased strength. Also, the bottom plate 2 has flange portions 22 formed such that both edge portions of the bottom plate 2 in the direction in which the plateau portions 2a and the trough portions 2b are alternately connected to each other (in an x direction) are bent upward.
Also, the bottom plate 2 has drain holes that are formed such that drain water that forms in the heat exchanger 7 and flows onto the bottom surface of the bottom plate 2 is drained outward. The drain pan 8 is placed on the top surface of the bottom plate 2 (refer to Fig. 6) and is positioned below the heat exchanger 7.
Fig. 5 is a perspective view that illustrates the base leg 3 of the casing 1 according to Embodiment 1. As illustrated in Fig. 3, the base legs 3 are located below the bottom plate 2 and support the bottom plate 2. The base legs 3 are each formed by, for example, bending a steel plate and extend along the direction in which the plateau portions 2a and the trough portions 2b of the bottom plate 2 are alternately connected to each other (along the x direction). The base legs 3 project from the bottom plate 2 in the x direction.
The base leg 3 has an installation portion 30, which is formed in a flat surface and installed on an installation surface of the outdoor unit 100 of a refrigeration cycle apparatus, a raised portion 31, which is raised upward from an end edge of the installation portion 30 that extends along the longitudinal direction (along the x direction), a support portion 32, which is bent from the upper end edge of the raised portion 31, which extends along the longitudinal direction (along the x direction), to the horizontal direction, and a wall portion 33, which is raised upward from the distal end edge of the support portion 32, which extends along the longitudinal direction (along the x direction). The base leg 3 is formed in a substantially C shape in vertical section that includes the installation portion 30, the raised portion 31, and the support portion 32. Note that the horizontal direction refers to a concept that includes a direction substantially horizontal and does not need to be strictly horizontal.
On the support portion 32, an end edge portion along which the plateau portions 2a and the trough portions 2b of the bottom plate 2 extend is placed. The bottom surfaces of the trough portions 2b of the bottom plate 2 are in contact with the top surface of the support portion 32. The bottom plate 2 and the support portion 32 have a positioning mechanism that positions the bottom plate 2 and the support portion 32 when the bottom plate 2 is placed on the support portion 32. The positioning mechanism has first embossments 21 formed at both end portions of the trough portions 2b to be placed on the base legs 3 and second embossments 34 formed at the support portions 32. The first embossment 21 is formed such that it projects upward from the top surface of the trough portion 2b. The plurality of first embossments 21 are formed with intervals in the direction in which the wave shapes are connected to each other. The second embossment 34 is formed such that it projects upward from the top surface of the support portion 32. The plurality of second embossments 34 are formed along the longitudinal direction of the support portion 32. The first embossments 21 and the second embossments 34 are engaged with each other when the bottom plate 2 is placed on the support portion 32. In a state where the first embossments 21 and the second embossments 34 are engaged with each other, they are joined by joining components such as screws through the lower surface of the bottom plate 2. The head portions of the joining components are housed inside the recesses of the second embossments 34. The outdoor unit 100 of a refrigeration cycle apparatus has the positioning mechanism so that the bottom plate 2 is easily installed in a predetermined position. Note that the positions at which the first embossments 21 and the second embossments 34 are formed and the number of them are not limited to those illustrated in the drawings and may be changed according to the installation position of the outdoor unit 100 of a refrigeration cycle apparatus or the shape, size, and other details of the bottom plate 2 as long as resultant changes are suited.
The wall portion 33 is formed such that its wall surface faces an edge portion of the bottom plate 2, which is placed on the support portion 32. As illustrated in Fig. 3, the wall portion 33 is formed such that its height is substantially the same as the flange portions 22 of the bottom plate 2. The wall portion 33 is positioned such that it surrounds, together with the flange portions 22, the base 20, which serves to form the bottom surface of the casing 1.
At both ends of the base leg 3 in the x direction, respective pillar fixation portions 35 are formed. Both ends of the base leg 3 are each formed by cutting at an angle that corresponds to the shape of the inclined surface 1c of the casing 1. Both ends are thus formed such that they each extend along a chamfer portion 4d of the pillar 4 that forms the inclined surface 1d. The pillar fixation portion 35 is brought into alignment with the chamfer portion 4d of the pillar 4 and is joined to the lower end portion of the pillar 4 with a bolt 42 (refer to Fig. 6).
Fig. 6 is an enlarged perspective view that illustrates portion A of the outdoor unit 100 of a refrigeration cycle apparatus illustrated in Fig. 1. Fig. 7 is a perspective view that illustrates a corner portion of the base 20 according to Embodiment 1 viewed from inside. Fig. 8 is a perspective view that illustrates one of the pillars 4 of the casing 1 according to Embodiment 1. The bottom plate 2 is provided with raised pieces 24 at respective corner portions and is joined to the pillars 4 by bolts 41. Also, the base legs 3 and the pillars 4 are joined to each other by bolts 40. Also, the lower edge portion of the front panel 5, which covers the second side surface 1b of the casing 1, is fixed to the base leg 3 by a bolt 44.

Pillar 4

The pillars 4 are fixed to the base 20 and form the respective four corner portions of the casing 1. The four pillars 4 are linked to each other by the base 20 at the lower end portion of the casing 1, are linked to each other by the fan casing 6 at the upper end portion of the casing 1, and as a result form the substantially cuboid shape of the casing 1.
One of the pillars 4 is provided with a first portion 4a that forms an edge of the first side surface 1a of the casing 1 in the width direction (in a y direction), a second portion 4e that forms an edge of the second side surface 1b in the width direction (in the x direction), and the chamfer portion 4d that connects the first portion 4a and the second portion 4e with each other. The first portion 4a of the pillar 4 is formed by portions such as a projected portion 4c, an inclined portion 4b, and a constricted portion 4g, which are listed in the order from the bottom up. At the lower end of the first portion 4a of the pillar 4, the projected portion 4c is formed along the shape of the edge portion of the base leg 3. The projected portion 4c is formed such that it projects in the perpendicular direction (in the x direction) to the first side surface 1a of the casing 1. At the upper portion of the projected portion 4c, the constricted portion 4g is formed. The constricted portion 4g is positioned closer to the heat exchanger 7 than is the projected portion 4c. The constricted portion 4g is joined to the flange portion 22 of the bottom plate 2 by a bolt 43. The projected portion 4c and the constricted portion 4g are connected to each other by the inclined portion 4b, which ensures the strength and rigidity of the pillar 4. Also, the second portion 4e of the pillar 4 is joined to the wall portion 33 of the base leg 3 by the bolt 40. As described above, the pillars 4 are joined to the bottom plate 2 and the base legs 3, which serves to form the base 20, by bolts and consequently form the main framework of the casing 1. Also, the shape of the lower end portion of the pillar 4 is formed such that it aligns with the shape of the end portion of the base leg 3. The portions of the pillar 4 are located such that the projected portion 4c aligns with an end surface 36 of the base leg 3 illustrated in Fig. 5, the chamfer portion 4d aligns with the pillar fixation portion 35, and the second portion 4e aligns with a surface of the wall portion 33.
Fig. 9 is an explanatory diagram that illustrates a section taken along line B-B illustrated in Fig. 2. Air flows into a gap 90 between the two outdoor units 100 of a refrigeration cycle apparatus toward the heat exchangers 7. The gap 90 is a space between the first side surfaces 1a of the two outdoor units 100 of a refrigeration cycle apparatus, which face each other. Air flows in from the second side surfaces 1b. The pillars 4 have the chamfer portions 4d in the section illustrated in Fig. 9 and air flows into a wide inflow port, which gradually narrows toward the heat exchangers 7. As a result, the air easily flows in. Note that the chamfer portion 4d is a portion that forms the inclined surface 1c of the casing 1 and a portion that corresponds to a chamfered shape provided at a corner portion, which extends from the bottom surface to the top surface of the casing 1.
Fig. 10 is an enlarged view that illustrates portion C illustrated in Fig. 2. At a portion of the gap 90 that is in the vicinity of the installation surface 91, the air inflow is likely to decrease because of an influence of the installation surface 91. In particular, as illustrated in Fig. 2, in a case where the outdoor units 100 of a refrigeration cycle apparatus are arranged in close proximity, the installation area needs to be reduced and the dimensions between the casings 1 are specified to be small. However, even while the first portions 4a of the pillars 4 are provided with the projected portions 4c at the lower end portions and the width dimensions of the base legs 3 in the x direction are thus ensured, the constricted portions 4g are provided higher than the base legs 3 and the bottom plate 2 and a width dimension W2 of the gap 90 is thus sufficiently ensured. This design ensures a sufficient amount of air even at the lower portions of the heat exchangers 7, which are susceptible to an influence of the installation surface 91.
An interval between the casings 1 in a case of close-proximity arrangement is usually specified based on a width dimension W of the gap between the portions at which the base legs 3 are located. For example, the width dimension W of the gap between the portions at which the base legs 3 are located is specified as 30 mm. As a result, the width dimension W2 of the gap between the constricted portions 4g is specified to be greater than 30 mm. Therefore, the outdoor units 100 of a refrigeration cycle apparatus are designed such that air easily flows into air suction ports of the first side surfaces 1a, at which the heat exchangers 7 are located.
Also, as illustrated in Fig. 7, the lower end portion of the constricted portion 4g of the pillar 4 is fixed to the edge portion of the flange portion 22 of the bottom plate 2. As a result, the drain pan 8 fixed onto the bottom plate 2 is located as close as possible to the constricted portion 4g of the pillar 4 in the x direction. Also, as a result, the constricted portion 4g of the pillar 4 is located in the vicinity of the heat exchanger 7 in the x direction. The outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 are formed as described above such that the gap 90 is increased through which air is supplied to the heat exchangers 7 located at the first side surfaces 1a and, even in a case of close-proximity arrangement, the efficiency of heat exchange is ensured. Also, the base leg 3, which supports the casing 1, is allowed to be made as large as possible in the width direction. As a result, the outdoor units 100 of a refrigeration cycle apparatus are stably located even outdoors.
As illustrated in Fig. 6 and Fig. 9, wall portions 4f are connected to the constricted portions 4g of the respective pillars 4 in the y direction. The wall portion 4f is located such that it closes an end of the heat exchanger 7 in the y direction. As a result, air sucked from the first side surface 1a into the casing 1 is prevented from bypassing the heat exchanger 7. Also, the wall portions 4f of the pillars 4 are formed such that the heat exchangers 7 are fixed and the casing 1, which includes the pillars 4, supports the heat exchangers.
As illustrated in Fig. 9, the constricted portions 4g of the respective pillars 4 are located with slight steps from the wall portions 4f in the x direction. As a result, air easily flows into the gap 90 along the pillars 4. Note that the constricted portion 4g and the wall portion 4f may be formed such that they are flush with each other.
Also, as illustrated in Fig. 7, the pillars 4 are provided with the respective constricted portion 4g, which thus allows the flange portions 22 of the bottom plate 2 to be fixed directly to the constricted portions 4g. In addition to the above, the bottom plate 2 and the pillars 4 are fixed to each other at the chamfer portions 4d and the raised pieces 24. The bottom plate 2 and the pillars 4 are further fixed to each other at the second portions 4e by the base legs 3. As described above, the bottom plate 2 and the pillars 4 are firmly connected to each other.
As illustrated in Fig. 10, the projected portions 4c of the pillars 4 project farther in the x direction than the constricted portions 4g and the wall portions 4f. This design allows the base legs 3, which are located inside the pillars 4, to project farther in the x direction than the bottom plate 2 and as a result, the casings 1 are each supported over wider areas. Therefore, the stability of the casings 1 is improved. Also, as illustrated in Fig. 5, the base legs 3 each have, at both ends, the pillar fixation portions 35, which are joined to the chamfer portions 4d of the pillars 4 by the bolts 42. As a result, the base legs 3 and the pillars 4 are integrated with each other. Therefore, the strength and rigidity of the casings 1 are improved.
As described above, the pillars 4, the bottom plate 2, and the base legs 3 are integrated with each other at the corner portions of the base 20 by the bolts 40 to 43. As a result, while the strength and rigidity of the casings 1 are ensured, the constricted portions 4g of the pillars 4 maintain a wide inflow air passage. Therefore, a sufficient amount of air to the heat exchangers 7 is ensured at the lower portions of the casings 1.
Fig. 11 is schematic views that illustrate respective gaps 90 in cases where the outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 and outdoor units 1000 of a refrigeration cycle apparatus according to a comparative example are each arranged in close proximity. Fig. 11(a) illustrates the gap 90 in a case where the outdoor units 1000 of a refrigeration cycle apparatus according to the comparative example are arranged in close proximity. Fig. 11(b) illustrates the gap 90 in a case where the outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 are arranged in close proximity. Outdoor units 1000A and 1000B according to the comparative example each have the first side surface 1a, which is formed substantially flush over a portion where the base legs 3, the bottom plate 2, and the heat exchanger 7 are located. In particular, a width dimension W1 between the flange portions 22 of the bottom plates 2 is almost the same as the width dimension W between the base legs 3.
On the other hand, in a case where the outdoor units 100 of a refrigeration cycle apparatus according to Embodiment 1 are arranged in close proximity, the structure is provided such that the flange portions 22 of the bottom plates 2 are inward to the heat exchangers 7 than are ends of the base legs 3. As a result, the width dimension W2 between the flange portions 22 of the bottom plates 2 is larger than the width dimension W between the base legs 3.
According to Embodiment 1, the constricted portions 4g of the pillars 4 are joined to the flange portions 22 of the bottom plate 2 by the bolts 43. As a result, the interval between the constricted portions 4g of the pillars 4, which form the corner portions of the casings 1 of outdoor units 100A and 100B, which are located adjacent to each other, of a refrigeration cycle apparatus is also almost the same as the width dimension W2 between the flange portions 22 of the bottom plates 2. This structure contributes to the expansion of the opening area of the gap 90.
By providing the constricted portion 4g and the projected portion 4c to the pillar 4, the inclined portion 4b is formed at the first portion 4a of the pillar 4. As described above, step shapes are formed at the lower ends of the pillars 4, around which the pillars 4 are joined to the flange portions 22 of the bottom plate 2. Therefore, the strength and rigidity of the base 20 of the casing 1 are improved.
While the outdoor unit 100 of a refrigeration cycle apparatus is described above with reference to an embodiment, the outdoor unit 100 of a refrigeration cycle apparatus is not limited to the structure of the embodiment as described above. The structure of the outdoor unit 100 of a refrigeration cycle apparatus described above is merely an example and may also include other components. One or some of the present components may also be omitted. In other words, the outdoor unit 100 of a refrigeration cycle apparatus encompasses, within a scope that does not deviate from its technical concept, design modifications and variations of application typically made by those skilled in the art.

Reference Signs List

1: casing, 1a: first side surface, 1b: second side surface, 1c: inclined surface, 2: bottom plate, 2a: plateau portion, 2b: trough portion, 3: base leg, 4: pillar, 4a: first portion, 4b: inclined portion, 4c: projected portion, 4d: chamfer portion, 4e: second portion, 4f: wall portion, 4g: constricted portion, 5: front panel, 6: fan casing, 7: heat exchanger, 8: drain pan, 20: base, 21: first embossment, 22: flange portion, 24: raised piece, 30: installation portion, 31: raised portion, 32: support portion, 33: wall portion, 34: second embossment, 35: pillar fixation portion, 36: end surface, 40: bolt, 41: bolt, 42: bolt, 43: bolt, 44: bolt, 81: air-sending fan, 90: gap, 91: installation surface, 100: outdoor unit, 100A: outdoor unit, 100B: outdoor unit, 1000: outdoor unit, 1000A: outdoor unit, 1000B: outdoor unit, W: width dimension, W1: width dimension, W2: width dimension

Claims

An outdoor unit of a refrigeration cycle apparatus provided with a casing formed in a cuboid shape; a heat exchanger housed inside the casing and located along a first side surface of the casing, the first side surface comprising an opening; and an air-sending fan located at an upper portion of the casing and configured to discharge air that passes through the heat exchanger from a top surface of the casing, the outdoor unit having the casing, which has a shape in which, in an area at least from a bottom surface of the casing to an area where the heat exchanger is housed, adjacent side surfaces of the casing are joined by an inclined surface, the outdoor unit comprising:
a base that forms the bottom surface of the casing and a support leg; and

a plurality of pillars that are joined to corner portions of the base and extend in a height direction of the casing,

a pillar of the plurality of pillars that is at least located at an edge of the first side surface having a lower end portion joined to the base and being provided with

a first portion that has a surface parallel to the first side surface and is positioned at the edge of the first side surface in a width direction,

a second portion that has a surface parallel to a second side surface adjacent to the first side surface and is positioned at an edge of the second side surface in the width direction, and

a chamfer portion that is located between the first portion and the second portion and has the inclined surface,

the first portion being provided with a projected portion formed at a lower end and a constricted portion positioned above the projected portion,

the constricted portion being positioned closer to the heat exchanger than is the projected portion in a perpendicular direction to the first side surface.
The outdoor unit of a refrigeration cycle apparatus of claim 1, wherein
the base is provided with

a base leg that supports the casing,

a bottom plate that is fixed to the base leg and forms the bottom surface of the casing, and

a drain pan fixed onto the bottom plate and at least located below the heat exchanger,

the base leg projects farther than the bottom plate and the constricted portion of the pillar in the perpendicular direction to the first side surface, and

the pillar is joined to the base leg at the lower end portion.
The outdoor unit of a refrigeration cycle apparatus of claim 2, wherein
an end portion of the base leg

is shaped along a lower end portion of the first portion, the chamfer portion, and the second portion of the pillar, and

is aligned with and joined to the pillar.
The outdoor unit of a refrigeration cycle apparatus of claim 2 or 3, wherein
the bottom plate has an edge portion provided with a flange portion raised upward, and

the constricted portion of the pillar is joined to the flange portion.
The outdoor unit of a refrigeration cycle apparatus of claim 4, wherein
the first portion

has an inclined portion that connects the constricted portion and the projected portion to each other, and

is joined to the bottom plate at an upper portion of the inclined portion.