US20170363303A1

US20170363303A1 - Outdoor unit

Info

Publication number: US20170363303A1
Application number: US15/520,887
Authority: US
Inventors: Hiroyuki JINNAI; Toshiyuki KUBONO; Tomoya YANASE; Hiroshi IWAZAKI
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2014-12-26
Filing date: 2014-12-26
Publication date: 2017-12-21
Also published as: EP3249310A4; JPWO2016103447A1; EP3249310B1; JP6552524B2; WO2016103447A1; CN107110522A; CN107110522B; EP3249310A1

Abstract

An outdoor unit includes a housing including a side panel, a terminal block accommodated in the housing, and a power supply wire connected to the terminal block. The side panel includes an outer shell surface forming a part of an outer surface of the housing, a first recessed surface recessed from the outer shell surface in an inward direction of the housing, and a second recessed surface formed in the first recessed surface and recessed from the first recessed surface in the inward direction of the housing. The power supply wire is arranged on the second recessed surface.

Description

TECHNICAL FIELD

The present invention relates to an outdoor unit for an air-conditioning apparatus.

BACKGROUND ART

In a related-art outdoor unit of an air-conditioning apparatus, a compressor, a heat exchanger, a fan, and other components are accommodated in a housing. The fan is driven to supply outside air to the heat exchanger, and the compressor is operated to circulate refrigerant of a refrigeration cycle. Electric power for operating the compressor, the fan, and other components is supplied to a terminal block of the outdoor unit via a power supply wire. The power supply wire is fixed to a side panel by a fixing member at an end side to be connected to the terminal block. Further, the terminal block is exposed through an opening portion of the side panel of the housing, and the opening portion and the fixing member for the power supply wire are covered with a terminal block cover that is formed separately from the side panel (see, for example, Patent Literature 1).

CITATION LIST

Patent Literature

Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2010-144944

SUMMARY OF INVENTION

Technical Problem

In the above-mentioned related-art outdoor unit, the fixing member configured to fix the power supply wire to the side panel protrudes outward from the side panel, and the terminal block cover configured to cover the fixing member also significantly protrudes outward from the side panel.
The above-mentioned outdoor unit including the terminal block cover significantly protruding from the side panel is upsized in outer-shape dimension. Thus, transport efficiency decreases and installation space increases. Further, a side surface of the housing protrudes by the terminal block cover. Thus, design is degraded and the terminal block cover is damaged due to collision of the terminal block cover to an object.
Further, when the housing width is reduced, the width dimension of the heat exchanger is reduced, leading to a reduced heat transfer area and thus decrease in heat exchange efficiency.
The present invention has been made in view of the problems described above, and has an object to provide an outdoor unit of an air-conditioning apparatus in which outward protruding dimension of a terminal block cover from a side panel is decreased to be small, and thus a housing is downsized.

Solution to Problem

An outdoor unit according to one embodiment of the present invention includes a housing including a side panel, a terminal block accommodated in the housing, and a power supply wire connected to the terminal block. The side panel includes an outer shell surface forming a part of an outer surface of the housing, a first recessed surface recessed from the outer shell surface in an inward direction of the housing, and a second recessed surface formed in the first recessed surface and recessed from the first recessed surface in the inward direction of the housing. The power supply wire is arranged on the second recessed surface.

Advantageous Effects of Invention

In the outdoor unit according to the one embodiment of the present invention, the outward protruding dimension of the terminal block cover from the side panel of the housing can be decreased to be small, and thus the housing can be downsized.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of an outdoor unit according to Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of the outdoor unit according to Embodiment 1.

FIG. 3 is a front view of the outdoor unit according to Embodiment 1.

FIG. 4 is a top view of the outdoor unit according to Embodiment 1.

FIG. 5 is a side view of the outdoor unit according to Embodiment 1.

FIG. 6 is a side view of a state in which a terminal block cover of the outdoor unit according to Embodiment 1 is removed.

FIG. 7 is a side view of a state in which the terminal block cover of the outdoor unit according to Embodiment 1 is mounted.

FIG. 8 is a sectional view of a side panel of the outdoor unit according to Embodiment 1 taken along the line Z-Z of FIG. 6 and FIG. 7.

FIG. 9 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 1 of Embodiment 1 is removed.

FIG. 10 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 2 of Embodiment 1 is removed.

FIG. 11 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 3 of Embodiment 1 is removed.

FIG. 12 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 4 of Embodiment 1 is removed.

FIG. 13 is a sectional view of the side panel of the outdoor unit according to Embodiment 1 taken along the line Z-Z of FIG. 12 (state in which a terminal block cover 1 f is mounted).

FIG. 14 is a side view of a state in which a terminal block cover of an outdoor unit according to Embodiment 2 of the present invention is removed.

FIG. 15 is a sectional view of a side panel of the outdoor unit according to Embodiment 2 taken along the line Z-Z of FIG. 14 (state in which a terminal block cover 1 f is mounted).

FIG. 16 is a front view of an outdoor unit according to Embodiment 3 of the present invention.

FIG. 17 is a top view of the outdoor unit according to Embodiment 3.

FIG. 18 is a side view of a state in which a terminal block cover of the outdoor unit according to Embodiment 3 is mounted.

FIG. 19 is a sectional view of a side panel of the outdoor unit according to Embodiment 3 taken along the line Z-Z of FIG. 18.

DESCRIPTION OF EMBODIMENTS

An outdoor unit for an air-conditioning apparatus according to the present invention is described below with reference to drawings.
A configuration of the outdoor unit described below is merely an example, and the outdoor unit according to the present invention is not limited to the configuration described below. Further, in the drawings, the same or similar components are denoted by the same reference signs, or the reference signs for the same or similar components are omitted. Further, the illustration of details in the structure is appropriately simplified or omitted. Further, overlapping description or similar description is appropriately simplified or omitted.

Embodiment 1

An outdoor unit according to Embodiment 1 of the present invention is described with reference to FIG. 1 to FIG. 5.

FIG. 1 is a perspective view of the outdoor unit according to Embodiment 1.
FIG. 2 is an exploded perspective view of the outdoor unit according to Embodiment 1.
FIG. 3 is a front view of the outdoor unit according to Embodiment 1.
FIG. 4 is a top view of the outdoor unit according to Embodiment 1.
FIG. 5 is a side view of the outdoor unit according to Embodiment 1.
As illustrated in FIG. 1, a housing 1 of the outdoor unit is formed of sheet metal and have a substantially cuboid shape. As illustrated in FIG. 2 to FIG. 5, the housing 1 mainly includes an L-shaped front panel 1 a arranged on a front side of the housing 1, a side panel 1 b covering a side surface of the housing 1, a top panel 1 c covering an upper surface of the housing 1, and a bottom panel 1 d arranged on a bottom surface of the housing 1. Further, a front grille 1 e having openings is mounted on the front panel 1 a, and a terminal block cover 1 f covering electrical components such as a terminal block is mounted on the side panel 1 b.
An opening 1 h for allowing a power supply wire 11 to pass through the opening 1 h is formed at a lower end of the terminal block cover 1 f. On an inner side of the terminal block cover 1 f, a terminal block 10 to be used to connect power for operating a compressor 2, a fan 4, and other components is arranged. The terminal block 10 is supplied with, for example, three-phase power via the power supply wire 11.
Further, two foot portions 1 g for supporting the outdoor unit are arranged on a lower surface of the bottom panel 1 d of the housing 1.
The housing 1 accommodates the compressor 2 configured to compress refrigerant, an outdoor heat exchanger 3 configured to exchange heat between outside air and the refrigerant, the fan 4 configured to supply the outside air to the outdoor heat exchanger 3, and a support base 5 for supporting the fan 4, on which a motor for the fan is mounted.
Further, a fan chamber 4 a in which the fan 4 is arranged and a machine chamber 2 a in which the compressor 2 is arranged are partitioned by a partition plate 6.
The outdoor heat exchanger 3 is a fin-and-tube heat exchanger in which, for example, heat transfer tubes pass through a plurality of aluminum thin plate-like fins arranged side by side. The outdoor heat exchanger 3 is entirely formed into a substantially L-shape, and is arranged along two side surfaces of the housing 1. The fins are arranged upright in a vertical direction, and the heat transfer tubes pass through the fins in a horizontal direction.
The fan 4 is arranged in the vicinity of the outdoor heat exchanger 3. Rotation of the fan 4 causes the outside air to pass between the fins of the outdoor heat exchanger 3, and at this time, heat is exchanged between the refrigerant flowing through the heat transfer tubes of the outdoor heat exchanger 3 and the outside air. The outside air after the heat exchange is exhausted to an outside of the housing 1 through the front grille 1 e.
When such an outdoor unit for an air-conditioning apparatus is operated, for example, during a heating operation, the outdoor heat exchanger 3 acts as an evaporator, and low-pressure gas refrigerant evaporated by receiving heat from the outside air is compressed into high-pressure gas refrigerant by the compressor 2, and is supplied to an indoor heat exchanger of an indoor unit (not shown).
Meanwhile, during a cooling operation, the outdoor heat exchanger 3 acts as a condenser, and high-pressure gas refrigerant compressed by the compressor 2 transfers heat to the outside air and is condensed in the outdoor heat exchanger 3. Then, the condensed liquid refrigerant is decompressed and supplied to the indoor heat exchanger of the indoor unit (not shown).

Next, the configuration around the terminal block of the outdoor unit according to Embodiment 1 is described with reference to FIG. 6 to FIG. 8.
FIG. 6 is a side view of a state in which the terminal block cover of the outdoor unit according to Embodiment 1 is removed.
FIG. 7 is a side view of a state in which the terminal block cover of the outdoor unit according to Embodiment 1 is mounted.
FIG. 8 is a sectional view of the side panel of the outdoor unit according to Embodiment 1 taken along the line Z-Z of FIG. 6 and FIG. 7.
As illustrated in FIG. 6, the side panel 1 b has a rectangular opening portion 15 for allowing the power supply wire 11 to the terminal block 10. The terminal block 10 is arranged inside the opening portion 15.
The side panel 1 b includes an outer shell surface 12 forming a part of an outer shell of the housing 1, a first recessed surface 13 recessed by one stage from the outer shell surface 12 toward the inner side of the housing 1, and a second recessed surface 14 further recessed by one stage from the first recessed surface 13 toward the inner side of the housing 1.
The outer shell surface 12, the first recessed surface 13, and the second recessed surface 14 are formed in parallel to each other. Each two adjacent surfaces of these three surfaces may be connected to each other with a gently inclined surface, or may be connected to each other with a perpendicular connection surface.
The first recessed surface 13 is formed into a rectangular shape including the periphery of the opening portion 15, and extends downward from the opening portion 15.
The second recessed surface 14 is formed within the range of the first recessed surface 13, and is formed into a substantially rectangular shape arranged between the lower end of the opening portion 15 and the lower end of the first recessed surface 13.
At the lower end of the second recessed surface 14, a tapered surface 14 a is formed to gently connect the second recessed surface 14 and the outer shell surface 12 to each other.
On the first recessed surface 13, the terminal block cover 1 f is mounted so that an inner surface side of the terminal block cover 1 f is brought into contact to the first recessed surface 13. As the terminal block cover 1 f, a flat plate member or a plate-like member having a protruding circumferential edge on the inner surface side can be adopted.
The terminal block cover 1 f is mounted on the first recessed surface 13 with screws or other members, and an outer surface of the terminal block cover 1 f and the outer shell surface 12 are arranged to be flush with each other as the same surface. Further, as illustrated in FIG. 5, the lower end of the terminal block cover 1 f is positioned not to be overlapped with the tapered surface 14 a at the lower end of the second recessed surface 14 in side view, and the side surface of the housing 1 has an opening 1 h communicating to the second recessed surface. The terminal block cover 1 f is only required to be fitted between the first recessed surface 13 and the outer shell surface 12, and the outer surface of the terminal block cover 1 f may be arranged closer to the inner side of the housing 1 than the outer shell surface 12.
As illustrated in FIG. 8, the power supply wire 11 is mounted in contact to the second recessed surface 14 of the side panel 1 b. At this time, a fixing member 16 including a recessed portion 16 a for receiving the power supply wire 11 is used to sandwich the power supply wire 11 between the second recessed surface of the side panel 1 b and the recessed portion 16 a of the fixing member 16.
As illustrated in FIG. 6, the power supply wire 11 has one end connected to the terminal block 10, and an other end arranged outside the terminal block cover 1 f through downward extension of the power supply wire 11 from the terminal block 10 over the lower portion of the second recessed surface.
The fixing member 16 is formed of a plate-like steel member, a plate-like resin member, or other materials, and has one end 16 b mounted to the second recessed surface 14 of the side panel 1 b with, for example, a hinge. Further, an other end 16 c of the fixing member 16 is fixed to a screw hole of the second recessed surface 14 with a screw or other member.
As illustrated in FIG. 8, the height of the fixing member 16 in a direction perpendicular to the second recessed surface 14 is a dimension within a distance between the first recessed surface 13 and the second recessed surface 14 so that, when the terminal block cover 1 f is mounted, the terminal block cover 1 f and the fixing member 16 do not interfere with each other. That is, the fixing member 16 is accommodated between the second recessed surface 14 and the first recessed surface 13.

When the power supply wire 11 is mounted to the terminal block 10 of the outdoor unit, first, the screws or other members fixing the terminal block cover 1 f are removed, and the terminal block cover 1 f is removed from the side panel 1 b. Next, a screw 16 d or other member is removed from the fixing member 16. Then, the power supply wire 11 is placed in the recessed portion 16 a of the fixing member 16, and the fixing member 16 is mounted to the side panel 1 b again with the screw 16 d or other member. Then, the terminal block cover 1 f is mounted on the first recessed surface 13 again. At this time, the power supply wire 11 is extended to the outside of the terminal block cover 1 f from a clearance secured between the tapered surface 14 a, which is formed at a lower portion of the second recessed surface 14, and the terminal block cover 1 f.

In the outdoor unit according to Embodiment 1, the height dimension of the fixing member 16 in the direction perpendicular to the second recessed surface 14 is set within the distance between the first recessed surface 13 and the second recessed surface 14, and the second recessed surface 14 is formed so that the terminal block cover 1 f and the fixing member 16 do not interfere with each other when the terminal block cover 1 f is mounted. Consequently, the housing 1 can be downsized particularly in the width-direction dimension without protrusion of the terminal block cover 1 f from the outer shell surface 12 in the side panel 1 b of the housing 1.

Modified Examples 1 to 3 of the configuration around the terminal block of the outdoor unit according to Embodiment 1 are described with reference to FIG. 9 to FIG. 11.
FIG. 9 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 1 of Embodiment 1 s removed.
In Embodiment 1, the second recessed surface 14 of the side panel 1 b is formed into a linear shape extending downward from the opening portion 15, but Modified Example 1 of FIG. 9 is an example in which the second recessed surface 14 is formed to horizontally extend from the opening portion 15 in a back surface direction of the housing 1. The fixing member 16 for the power supply wire 11 is arranged to sandwich the power supply wire 11 in the second recessed surface 14 in a lateral direction. Further, the terminal block cover 1 f is arranged in contact to the first recessed surface similarly to the case of Embodiment 1, and the terminal block cover 1 f is arranged not to be overlapped with the tapered surface 14 a of the second recessed surface 14 in side view. The terminal block cover 1 f has the opening 1 h through which the power supply wire 11 is communicated to the second recessed surface 14.

In the outdoor unit according to Modified Example 1, in addition to the effect of the outdoor unit according to Embodiment 1, the power supply wire 11 can be extended linearly in the back surface direction of the housing 1. Thus, the power supply wire can be smoothly connected when the power supply is located on the back surface side of the housing 1.

FIG. 10 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 2 of Embodiment 1 is removed.
FIG. 11 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 3 of Embodiment 1 is removed.
In Embodiment 1, the second recessed surface 14 of the side panel 1 b is formed into a linear shape extending downward from the opening portion 15, but Modified Examples 2 and 3 are examples in which, as illustrated in FIG. 10 and FIG. 11, the second recessed surface 14 is formed into an L-shape. The L-shape is obtained by forming the second recessed surface 14 extending downward from the opening portion 15 and then bending the second recessed surface 14 in the back surface direction of the housing 1. The fixing member 16 of the power supply wire 11 is arranged to sandwich the power supply wire 11 in the second recessed surface 14 in a vertical direction (Modified Example 2) or in a horizontal direction (Modified Example 3).
Further, the terminal block cover 1 f is arranged in contact to the first recessed surface similarly to the case of Embodiment 1, and is arranged not to be overlapped with the tapered surface 14 a of the second recessed surface 14 in side view. The terminal block cover 1 f has the opening 1 h through which the power supply wire 11 is communicated to the second recessed surface 14.

In the outdoor units according to Modified Examples 2 and 3, in addition to the effect of the outdoor unit according to Embodiment 1, the power supply wire 11 can be bent into an L-shape to be extended in the back surface direction of the housing 1. Thus, even when a pulling force acts on the power supply wire 11, the bent part may be deformed to absorb the pulling force, and thus the power supply wire 11 can be prevented from coming off from the terminal block 10.

FIG. 12 is a side view of a state in which the terminal block cover of the outdoor unit according to Modified Example 4 of Embodiment 1 is removed.
FIG. 13 is a sectional view of the side panel of the outdoor unit according to Embodiment 1 taken along the line Z-Z of FIG. 12 (state in which the terminal block cover 1 f is mounted).
In Embodiment 1, the first recessed surface 13 of the side panel 1 b has an independent rectangular shape, but Modified Example 4 is an example in which, as illustrated in FIG. 12, the first recessed surface 13 is formed from the periphery of the opening portion 15 to the lower end of the side panel 1 b, and the second recessed surface 14 is formed in the first recessed surface 13 and extends to the lower end of the side panel 1 b. The fixing member 16 for the power supply wire 11 is arranged to sandwich the power supply wire 11 in the second recessed surface 14 in the vertical direction.

In the outdoor unit according to Modified Example 4, in addition to the effect of the outdoor unit according to Embodiment 1, the power supply wire 11 can be extended to the lower end of the side panel 1 b. Thus, the power supply wire can be smoothly connected when the power supply is located on the bottom surface side of the housing 1. Further, the terminal block cover 1 f is mounted down to the lower end of the side panel 1 b, and hence the housing 1 can have a flat side surface, leading to improvement in design.

Embodiment 2

The fixing member 16 of the outdoor unit according to Embodiment 1 is mounted on the second recessed surface 14 that is recessed by two stages from the outer shell surface 12 with a screw or other member, but Embodiment 2 of the present invention differs from Embodiment 1 in the mounting location of the fixing member 16.

The configuration around a terminal block of an outdoor unit according to Embodiment 2 is described with reference to FIG. 14 and FIG. 15. Description of configurations common to Embodiment 1 is omitted as appropriate.
FIG. 14 is a side view of a state in which the terminal block cover of the outdoor unit according to Embodiment 2 is removed.
FIG. 15 is a sectional view of a side panel of the outdoor unit according to Embodiment 2 taken along the line Z-Z of FIG. 14 (state in which the terminal block cover 1 f is mounted).
As illustrated in FIG. 14, the side panel 1 b includes, similarly to the case of Embodiment 1, the outer shell surface 12 forming the part of the outer shell of the housing 1, the first recessed surface 13 recessed by one stage from the outer shell surface 12 toward the inner side of the housing 1, and the second recessed surface 14 further recessed by one stage from the first recessed surface 13 toward the inner side of the housing 1.
The first recessed surface 13 is formed into a rectangular shape including the periphery of the opening portion 15, and extends downward from the opening portion 15.
The second recessed surface 14 is formed within the range of the first recessed surface 13, and is formed into a substantially rectangular shape arranged between the lower end of the opening portion 15 and the lower end of the first recessed surface 13.
At the lower end of the second recessed surface 14, the tapered surface 14 a is formed to gently connect the second recessed surface 14 and the outer shell surface 12 to each other.
As illustrated in FIG. 15, on the first recessed surface 13, the terminal block cover 1 f is mounted so that the inner surface side of the terminal block cover 1 f is brought into contact to the first recessed surface 13. As the terminal block cover 1 f, a flat plate member or a plate-like member having a protruding circumferential edge on the inner surface side can be adopted.
The terminal block cover 1 f is mounted on the first recessed surface 13 with screws or other members, and the outer surface of the terminal block cover 1 f and the outer shell surface 12 are arranged to be flush with each other as the same surface. The terminal block cover 1 f is only required to be fitted between the first recessed surface 13 and the outer shell surface 12, and the outer surface of the terminal block cover 1 f may be arranged closer to the inner side of the housing 1 than the outer shell surface 12.
As illustrated in FIG. 15, the power supply wire 11 is mounted in contact to the second recessed surface 14 of the side panel 1 b. At this time, a fixing member 17 having a flat plate shape is used to sandwich the power supply wire 11 between the second recessed surface 14 of the side panel 1 b and an inner surface side of the fixing member 17.
As illustrated in FIG. 14, the power supply wire 11 has the one end connected to the terminal block 10, and the other end arranged outside the terminal block cover 1 f through downward extension of the power supply wire 11 from the terminal block 10 over the lower portion of the second recessed surface.
The fixing member 17 is formed of a plate-like steel member, a plate-like resin member, or other materials, and has one end 17 a and an other end 17 b fixed to screw holes of the first recessed surface 13 with screws 17 c or other members. Further, the fixing member 17 is accommodated between the first recessed surface 13 and the outer shell surface 12.

When the power supply wire 11 is mounted to the terminal block 10 of the outdoor unit, first, the screws or other members fixing the terminal block cover 1 f are removed, and the terminal block cover 1 f is removed from the side panel 1 b. Next, the screws 17 c or other members are removed from the fixing member 17. Then, the power supply wire 11 is placed on the second recessed surface 14, and the fixing member 17 is mounted to the side panel 1 b again with the screws 17 c or other members. Then, the terminal block cover 1 f is mounted on the first recessed surface 13 again. At this time, the power supply wire 11 is extended to the outside of the terminal block cover 1 f from a clearance secured between the tapered surface 14 a, which is formed at the lower portion of the second recessed surface 14, and the terminal block cover 1 f.

In the outdoor unit according to Embodiment 2, the fixing member 17 is formed into a flat plate shape to reduce the height dimension of the fixing member 17 in the direction perpendicular to the second recessed surface 14, and the outer surface side of the terminal block cover 1 f is arranged to be flush with the outer shell surface 12 of the side panel 1 b when the terminal block cover 1 f is mounted. Consequently, the housing 1 can be downsized particularly in the width-direction dimension without protrusion of the terminal block cover 1 f from the outer shell surface 12 in the side panel 1 b of the housing 1.
The outdoor unit according to Embodiment 2 may adopt the configurations of Modified Examples 1 to 4 according to Embodiment 1, to thereby lead out the power supply wire 11 in a desired direction.

Embodiment 3

An outdoor unit according to Embodiment 3 of the present invention differs from the outdoor units according to Embodiments 1 and 2 in the shape of the side panel 1 b, and hence this point is mainly described. Description of configurations common to Embodiments 1 and 2 is omitted as appropriate.

The configuration around the terminal block of the outdoor unit according to Embodiment 3 is described with reference to FIG. 16 to FIG. 19.
FIG. 16 is a front view of the outdoor unit according to Embodiment 3.
FIG. 17 is a top view of the outdoor unit according to Embodiment 3.
FIG. 18 is a side view of a state in which the terminal block cover of the outdoor unit according to Embodiment 3 is mounted.
FIG. 19 is a sectional view of the side panel of the outdoor unit according to Embodiment 3 taken along the line Z-Z of FIG. 18.
The housing 1 of the outdoor unit according to Embodiment 3 has a basic configuration as illustrated in FIG. 16 to FIG. 18, which is the same configuration as the outdoor units according to Embodiments 1 and 2.
However, as illustrated in FIG. 19, a sectional shape of the side panel 1 b is different.
That is, in Embodiments 1 and 2, as illustrated in FIG. 8, FIG. 13, and FIG. 15, the side panel 1 b is formed into a terraced mortar shape from both sides with the outer shell surface 12 forming the part of the outer shell of the housing 1, the first recessed surface 13 recessed by one stage from the outer shell surface 12 toward the inner side of the housing 1, and the second recessed surface 14 further recessed by one stage from the first recessed surface 13 toward the inner side of the housing 1. In Embodiment 3, as illustrated in FIG. 19, the outer shell surface 12 is not present on the front surface side of the housing 1 (left side in the drawing sheet), and the front surface side of the housing 1 is connected by being bent toward the front panel 1 a side from the first recessed surface 13.
Similarly to Embodiments 1 and 2, the outer shell surface 12, the first recessed surface 13, and the second recessed surface 14 are formed in parallel to each other. Each two adjacent surfaces of these three surfaces may be connected to each other with a gently inclined surface, or may be connected to each other with a perpendicular connection surface.
The first recessed surface 13 is formed into a rectangular shape including the periphery of the opening portion 15, and extends downward from the opening portion 15.
On the first recessed surface 13, the terminal block cover 1 f is mounted so that the inner surface side of the terminal block cover 1 f is brought into contact to the first recessed surface 13. As the terminal block cover 1 f, a flat plate member or a plate-like member having a protruding circumferential edge on the inner surface side can be adopted. As illustrated in FIG. 18, the terminal block cover 1 f is extended down to the lower end of the side panel 1 b.
The terminal block cover 1 f is arranged to be fitted between the first recessed surface 13 and the outer shell surface 12. At this time, the outer surface of the terminal block cover 1 f and the outer shell surface 12 may be arranged to be flush with each other as the same surface, or the outer surface of the terminal block cover 1 f may be arranged closer to the inner side of the housing 1 than the outer shell surface 12.
As illustrated in FIG. 19, the power supply wire 11 is mounted in contact to the second recessed surface 14 of the side panel 1 b. At this time, the fixing member 16 including the recessed portion 16 a for receiving the power supply wire 11 is used to sandwich the power supply wire 11 between the second recessed surface of the side panel 1 b and the recessed portion 16 a of the fixing member 16.
The power supply wire 11 has the one end connected to the terminal block 10, and the other end arranged outside the terminal block cover 1 f through downward extension of the power supply wire 11 from the terminal block 10 over the lower portion of the second recessed surface.
The height of the fixing member 16 in the direction perpendicular to the second recessed surface 14 is a dimension that enables the fixing member 16 to be accommodated inside the terminal block cover 1 f, which is a plate-like member having a protruding circumferential edge as illustrated in FIG. 19. Further, the outer surface of the terminal block cover 1 f is formed not to protrude to the outside from the outer shell surface 12 of the side panel 1 b.
Further, similarly to Embodiment 1, the height of the fixing member 16 in the direction perpendicular to the second recessed surface 14 may be a dimension within the distance between the first recessed surface 13 and the second recessed surface 14 so that, when the flat plate-shaped terminal block cover 1 f is mounted, the terminal block cover 1 f and the fixing member 16 do not interfere with each other.

In the outdoor unit according to Embodiment 3, as illustrated in FIG. 19, even when the outer shell surface 12 is not present on the front side (left side in the drawing) of the housing 1, the power supply wire 11 and the fixing member 16 may be arranged on the second recessed surface 14. Thus, the housing 1 can be downsized particularly in the width-direction dimension without protrusion of the outer surface of the terminal block cover 1 f from the outer shell surface 12 in the side panel 1 b. Consequently, in addition to the effects of the invention according to Embodiments 1 and 2, the side panel 1 b can be shaped in many variations, and the outdoor unit can be improved in design.
The shape of the side panel 1 b according to Embodiment 3 is applicable to the configurations of the outdoor units according to Embodiments 1 and 2.

REFERENCE SIGNS LIST

1 housing 1 a front panel 1 b side panel 1 c top panel 1 d bottom panel 1 e front grille 1 f terminal block cover 1 g foot portion 1 h opening 2 compressor 2 a machine chamber 3 outdoor heat exchanger 4 fan 4 a fan chamber 5 support base 6 partition plate 10 terminal block 11 power supply wire 12 outer shell surface 13 first recessed surface 14 second recessed surface 14 a tapered surface 15 opening portion 16 fixing member 16 a recessed portion 16 b one end 16 c other end 16 d screw 17 fixing member 17 a one end 17 b other end 17 c screw

Claims

1. An outdoor unit, comprising:

a housing including a side panel and a front panel connected to the side panel; and

a terminal block accommodated in the housing, the side panel including

an outer shell surface forming a part of an outer surface of the housing,

a first recessed surface recessed from the outer shell surface in an inward direction of the housing, and

a second recessed surface formed in the first recessed surface and recessed from the first recessed surface in the inward direction of the housing,

the first recessed surface having a side connected to the front panel, on the second recessed surface, a power supply wire connected to the terminal block being arranged.

2. The outdoor unit of claim 1, wherein the side panel includes a terminal block cover configured to cover the terminal block, the terminal block cover being mounted to be accommodated between the first recessed surface and the outer shell surface.

3. The outdoor unit of claim 2, wherein the terminal block cover is mounted on the first recessed surface in contact to the first recessed surface.

4. The outdoor unit of claim 2, wherein the terminal block cover has an outer surface arranged to be flush with the outer shell surface.

5. The outdoor unit of claim 1, further comprising a fixing member configured to fix the power supply wire to the side panel, the fixing member being mounted on the second recessed surface.

6. The outdoor unit of claim 5, wherein the fixing member is accommodated between the second recessed surface and the first recessed surface.

7. The outdoor unit of claim 1, further comprising a fixing member configured to fix the power supply wire to the side panel, the fixing member being mounted on the first recessed surface.

8. The outdoor unit of claim 7, wherein the fixing member is accommodated between the first recessed surface and the outer shell surface.