Outdoor unit and refrigeration cycle device

Abstract

One embodiment of an outdoor unit according to the present disclosure is provided with a fan grill that covers a blowout port from the outside of a housing. The fan grill comprises an opposing part that is disposed so as to face the blowout port, and an outer frame part that protrudes toward the housing from the outer peripheral edge of the opposing part. The opposing part has a plurality of first crosspieces extending in a first direction and a plurality of second crosspieces extending in a second direction and intersecting with the first crosspieces. The opposing part has formed therein a plurality of first ventilation holes that are partitioned by the first crosspieces and the second crosspieces. The outer frame part has extension sections extending in an intersecting direction that intersects with the axial direction. The extension sections have a plurality of third crosspieces arranged apart from each other in the intersecting direction. In the extension sections, second ventilation holes are formed between adjacent ones of the third crosspieces in the intersecting direction. The flow path cross-sectional area of the second ventilation holes is smaller than that of the first ventilation holes. The maximum dimension of the third crosspieces in the intersecting direction is greater than that of the first crosspieces in the second direction and that of the section crosspieces in the first direction.

Description

Outdoor unit and refrigeration cycle device

[0001] The present disclosure relates to an outdoor unit and a refrigeration cycle device.

[0002] For example, as described in Patent Document 1, an outdoor unit of an air conditioner (refrigeration cycle device) that is equipped with a fan guard (fan grill) is known.

[0003] Japanese Patent Application Laid-Open No. 2016-130616

[0004] In outdoor units such as those described above, as described in Patent Document 1, ventilation holes may be formed on the side surfaces of the fan guard to reduce ventilation resistance. In this case, there is a risk of a short-cycle phenomenon in which air blown out from the ventilation holes formed on the side surfaces of the fan guard is sucked back into the outdoor unit. Because the air blown out from the ventilation holes has undergone heat exchange, passing the air through the heat exchanger again suppresses the evaporation or condensation of the refrigerant flowing through the heat exchanger, resulting in a problem of reduced heat exchange efficiency in the outdoor unit.

[0005] In view of the above circumstances, one of the objects of the present disclosure is to provide an outdoor unit having a structure that can reduce the ventilation resistance of the fan grill while suppressing the occurrence of the short cycle phenomenon, and a refrigeration cycle device equipped with such an outdoor unit.

[0006] One aspect of the outdoor unit according to the present disclosure is an outdoor unit for a refrigeration cycle device, the outdoor unit comprising: a housing having an air outlet; a blower fan having rotors arranged inside the housing facing the air outlet; and a fan grill covering the air outlet from the outside of the housing, the fan grill having a facing portion arranged facing the air outlet in an axial direction of a rotation axis of the rotors; and an outer frame portion protruding from an outer peripheral edge portion of the facing portion toward the housing, the facing portion including a plurality of first bars extending in a first direction intersecting the axial direction and arranged at intervals in a second direction intersecting both the axial direction and the first direction; and a plurality of first bars extending in the second direction and intersecting the plurality of first bars, and a plurality of second bars arranged at intervals in a first direction, and a plurality of first ventilation holes separated by the plurality of first bars and the plurality of second bars are formed in the opposing portion, the outer frame portion has an extension portion extending in a transverse direction intersecting the axial direction, and the extension portion has a plurality of third bars arranged at intervals in the transverse direction, and a second ventilation hole is formed in each of the extension portions between adjacent third bars in the transverse direction, the flow path cross-sectional area of ​​the second ventilation hole is smaller than the flow path cross-sectional area of ​​the first ventilation hole, and the maximum dimension in the transverse direction of the third bar is larger than the maximum dimension in the second direction of the first bar and the maximum dimension in the first direction of the second bar.

[0007] One aspect of the refrigeration cycle apparatus according to the present disclosure includes the outdoor unit described above.

[0008] According to the present disclosure, in an outdoor unit of a refrigeration cycle device, it is possible to reduce the airflow resistance of a fan grill and suppress the occurrence of the short cycle phenomenon.

[0009] 6A and 6B are cross-sectional views showing a part of the facing portion in the first embodiment, taken along line VIII-VIII in FIG. 6A; and FIG. 6B are cross-sectional views showing a part of the facing portion in the first embodiment, taken along line IX-IX in FIG. 6A. A view of a part of a housing and a part of a side frame in the first embodiment, taken from the left. A cross-sectional view showing a part of a side frame in the first embodiment, taken along line XI-XI in FIG. 10A. A cross-sectional view of a part of an outdoor unit in the first embodiment, taken from the top. A cross-sectional view of a part of an outdoor unit in the second embodiment, taken from the left.

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present disclosure. In addition, in the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure in order to make each configuration easier to understand.

[0011] The drawings also show the X-axis, Y-axis, and Z-axis as appropriate. The X-axis indicates one of the horizontal directions. The Y-axis indicates the other of the horizontal directions. The Z-axis indicates the vertical direction. In the following description, the horizontal direction along the X-axis is referred to as the "front-rear direction X," the horizontal direction along the Y-axis is referred to as the "left-right direction Y," and the vertical direction along the Z-axis is referred to as the "vertical direction Z." The front-rear direction X, left-right direction Y, and vertical direction Z are perpendicular to each other. In the following description, the side of the vertical direction Z toward which the Z-axis arrow points (+Z side) is referred to as the upper side, and the side of the vertical direction Z opposite to the side toward which the Z-axis arrow points (-Z side) is referred to as the lower side. Furthermore, the side of the front-rear direction X toward which the X-axis arrow points (+X side) is referred to as the front side, and the side of the front-rear direction X opposite to the side toward which the X-axis arrow points (-X side) is referred to as the rear side. The left-right direction Y is the left-right direction when the outdoor unit in each of the following embodiments is viewed from the front (+X side). That is, the side of the left-right direction Y toward which the Y-axis arrow points (+Y side) is the right side, and the side of the left-right direction Y opposite to the side toward which the Y-axis arrow points (-Y side) is the left side.

[0012] In the following embodiments, the vertical direction Z corresponds to the “first direction,” and the left-right direction Y corresponds to the “second direction.” The left side (−Y side) corresponds to the “first side of the second direction,” and the right side (+Y side) corresponds to the “second side of the second direction.”

[0013] Embodiment 1. Fig. 1 is a schematic diagram showing the general configuration of a refrigeration cycle apparatus 100 in Embodiment 1. The refrigeration cycle apparatus 100 is an apparatus that utilizes a refrigeration cycle in which a refrigerant 19 circulates. In Embodiment 1, the refrigeration cycle apparatus 100 is an air conditioner. As shown in Fig. 1, the refrigeration cycle apparatus 100 includes an outdoor unit 10, an indoor unit 20, and a circulation path section 18. The outdoor unit 10 is disposed outdoors. The indoor unit 20 is disposed indoors. The outdoor unit 10 and the indoor unit 20 are connected to each other by the circulation path section 18 through which the refrigerant 19 circulates. The outdoor unit 10 and the indoor unit 20 are heat exchange units that exchange heat with air.

[0014] The refrigeration cycle apparatus 100 can adjust the temperature of indoor air by exchanging heat between the refrigerant 19 flowing through the circulation path 18 and the air in a room where the indoor unit 20 is located. Examples of the refrigerant 19 flowing through the circulation path 18 include fluorine-based refrigerants or hydrocarbon-based refrigerants with low global warming potential (GWP). Examples of the refrigerant 19 include a single refrigerant selected from R1234yf, R1234ze, R32, and R290, a mixture of two or more of these refrigerants, or a mixture of any of these refrigerants with another refrigerant. Examples of the refrigerant 19 include a mixture of R1132(E) and R1123. Examples of the refrigerant 19 include mixed refrigerants of R516A, R445A, R444A, R454C, R444B, R454A, R455A, R457A, R459B, R452B, R454B, R447B, R447A, R446A, and R459A.

[0015] The outdoor unit 10 includes a housing 11, a compressor 12, a heat exchanger 13, a flow rate adjustment valve 14, a blower fan 15, a four-way valve 16, and a control unit 17. The housing 11 houses the compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, the blower fan 15, the four-way valve 16, and the control unit 17.

[0016] The compressor 12, the heat exchanger 13, the flow rate control valve 14, and the four-way valve 16 are provided in a portion of the circulation path 18 that is located inside the housing 11. The compressor 12, the heat exchanger 13, the flow rate control valve 14, and the four-way valve 16 are connected by a portion of the circulation path 18 that is located inside the housing 11.

[0017] The four-way valve 16 is provided in a portion of the circulation path section 18 that is connected to the discharge side of the compressor 12. The four-way valve 16 can reverse the direction of the refrigerant 19 flowing through the circulation path section 18 by switching a portion of the path of the circulation path section 18. When the path connected by the four-way valve 16 is the path shown by the solid line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the solid arrow in Fig. 1. On the other hand, when the path connected by the four-way valve 16 is the path shown by the dashed line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the dashed arrow in Fig. 1.

[0018] The indoor unit 20 includes a housing 21, a heat exchanger 22, and a blower fan 23. The housing 21 houses the heat exchanger 22 and the blower fan 23. The indoor unit 20 is capable of cooling operation to cool the air in the room where the indoor unit 20 is located, and heating operation to warm the air in the room where the indoor unit 20 is located.

[0019] When the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the solid arrow in Fig. 1. In other words, when the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow control valve 14, and the heat exchanger 22 of the indoor unit 20 in that order, before returning to the compressor 12. During cooling operation, the heat exchanger 13 in the outdoor unit 10 functions as a condenser, and the heat exchanger 22 in the indoor unit 20 functions as an evaporator.

[0020] On the other hand, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the dashed line in Fig. 1. In other words, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow control valve 14, and the heat exchanger 13 of the outdoor unit 10 in that order, before returning to the compressor 12. In heating operation, the heat exchanger 13 in the outdoor unit 10 functions as an evaporator, and the heat exchanger 22 in the indoor unit 20 functions as a condenser.

[0021] Next, the outdoor unit 10 will be described in further detail. Fig. 2 is a perspective view showing the outdoor unit 10. Fig. 3 is an exploded perspective view showing the outdoor unit 10. Fig. 4 is a partial cross-sectional view of the outdoor unit 10 as seen from above. Fig. 5 is a partial cross-sectional view of the outdoor unit 10 as seen from the left side (-Y side).

[0022] 2 to 5, the housing 11 of the outdoor unit 10 is a generally rectangular box-like shape that is long in the left-right direction Y. As shown in Fig. 4, the interior of the housing 11 is partitioned in the left-right direction Y into a blower chamber 11a and a machine chamber 11b. A heat exchanger 13 and a blower fan 15 are disposed in the blower chamber 11a. A compressor 12 is disposed in the machine chamber 11b.

[0023] 4 and 5, the housing 11 has suction ports 11c and 11d that draw in air AF. The suction port 11c is formed in a rear wall portion 11f that is located on the rear side (-X side) of the walls that make up the housing 11. The suction port 11c penetrates the rear wall portion 11f in the front-rear direction X. A plurality of suction ports 11c are formed, for example, in a lattice pattern.

[0024] The suction port 11d is formed in a side wall portion 11g located on the left side (-Y side) of the wall portions constituting the housing 11. The suction port 11d penetrates the side wall portion 11g in the left-right direction Y. As shown in FIGS. 2 and 3, a plurality of suction ports 11d are formed. In the example of FIGS. 2 and 3, the plurality of suction ports 11d are rectangular in shape and are elongated in the vertical direction Z. In the example of FIGS. 2 and 3, three rows of four suction ports 11d are arranged at intervals in the front-rear direction X, and three rows of four suction ports 11d are arranged at intervals in the vertical direction Z.

[0025] As shown in FIG. 3 , the housing 11 has an air outlet 11e through which air AF is blown out. The air outlet 11e is formed in a front wall 11h, which is located on the front side (+X side) of the wall portions constituting the housing 11. In other words, the outdoor unit 10 in embodiment 1 is a side-blowing type outdoor unit in which the air AF outlet 11e is formed in the front wall portion of the housing 11. The air outlet 11e penetrates the front wall 11h in the front-rear direction X and opens forward. In embodiment 1, the air outlet 11e has a circular shape centered on the rotation axis R, which will be described later. The air outlet 11e is formed by the front opening of a cylindrical bell mouth 11j attached to a housing main body 11i that is a substantially rectangular box-shaped body. Note that the bell mouth 11j is not shown in FIGS. 4 and 5 .

[0026] As shown in FIG. 4 , in the first embodiment, the heat exchanger 13 is generally L-shaped when viewed in the vertical direction Z. The heat exchanger 13 has a main body 13c. In the first embodiment, only one main body 13c is provided. The main body 13c has a first heat exchanger 13a extending in the left-right direction Y and a second heat exchanger 13b extending from the left end (-Y side) of the first heat exchanger 13a to the front (+X side). The first heat exchanger 13a is disposed facing the front (+X side) of the multiple air inlets 11c. The second heat exchanger 13b is disposed facing the right (+Y side) of the multiple air inlets 11d.

[0027] In the first embodiment, the blower fan 15 is a propeller fan. The blower fan 15 is located in front of the heat exchanger 13 (in the +X direction). More specifically, the blower fan 15 is located in front of the first heat exchange unit 13a and to the right of the second heat exchange unit 13b (in the +Y direction). The blower fan 15 has rotors 15a that can rotate about a rotation axis R extending in the front-rear direction X. The rotors 15a are rotated about the rotation axis R by a motor 15b. The rotation axis R is a virtual axis extending in the front-rear direction X. In other words, in the first embodiment, the axial direction of the rotation axis R is the front-rear direction X. In the following description, the axial direction of the rotation axis R may be simply referred to as the "axial direction," the radial direction about the rotation axis R may be simply referred to as the "radial direction," and the circumferential direction about the rotation axis R may be simply referred to as the "circumferential direction."

[0028] The rotor 15a is disposed inside the housing 11 facing the air outlet 11e. When viewed from the front (+X direction), the entire rotor 15a is located inside the inner edge of the air outlet 11e. The rotor 15a is located behind the air outlet 11e (-X direction). When the rotor 15a rotates, air AF is sucked into the housing 11 through a plurality of suction ports 11c formed in the rear wall 11f of the housing 11 and a plurality of suction ports 11d formed in the side wall 11g of the housing 11. The air AF sucked into the housing 11 by the rotor 15a passes through the heat exchanger 13 and the rotor 15a, and is blown out to the front of the housing 11 from the air outlet 11e.

[0029] 2 to 5, the outdoor unit 10 includes a fan grill 30 that covers the air outlet 11e from the outside of the housing 11. The fan grill 30 is a member provided to prevent the rotor 15a from coming into contact with human hands. The fan grill 30 is attached to the housing 11. For example, the fan grill 30 is fastened to the housing 11 with screws. Note that the fan grill 30 may also be attached to the housing 11 by, for example, locking claws.

[0030] As shown in FIG. 3 , in the first embodiment, the fan grill 30 has a rectangular shape when viewed in the front-rear direction X, with a pair of sides extending in the left-right direction Y and a pair of sides extending in the vertical direction Z. More specifically, the fan grill 30 has a substantially square shape when viewed in the front-rear direction X. In the first embodiment, the fan grill 30 is thin in the front-rear direction X and has a substantially box-like shape that opens on the rear side (−X side). The fan grill 30 covers the entire air outlet 11e from the front (+X side). In the first embodiment, the center of the fan grill 30 in the vertical direction Z is located at the same position as the rotation axis R in the vertical direction Z. The side of the fan grill 30 in the axial direction (front-rear direction X) where the housing 11 is located is the rear side (−X side), and the side opposite the side where the housing 11 is located in the axial direction is the front side (+X side).

[0031] The fan grill 30 has a facing portion 31 and an outer frame portion 36. The facing portion 31 is disposed facing the air outlet 11e in the axial direction of the rotation axis R, i.e., in the front-rear direction X. The facing portion 31 is located forward (+X direction) of the air outlet 11e. The rotation axis R passes through the facing portion 31. When viewed in the front-rear direction X, the facing portion 31 has a rectangular shape having a pair of sides extending in the left-right direction Y and a pair of sides extending in the vertical direction Z. As shown in FIG. 2 , the outer peripheral edge of the facing portion 31 is located radially outward from the air outlet 11e. The dimension of the facing portion 31 in the left-right direction Y is larger than the dimension of the air outlet 11e in the left-right direction Y, i.e., the inner diameter of the air outlet 11e. The dimension of the facing portion 31 in the vertical direction Z is larger than the dimension of the air outlet 11e in the vertical direction Z, i.e., the inner diameter of the air outlet 11e.

[0032] Fig. 6 is a view of a portion of the facing portion 31 as seen from the front side. Fig. 7 is a partially sectional perspective view showing a portion of the facing portion 31. Fig. 8 is a view showing a portion of the facing portion 31, which is a cross-sectional view taken along line VIII-VIII in Fig. 6. Fig. 9 is a view showing a portion of the facing portion 31, which is a cross-sectional view taken along line IX-IX in Fig. 6.

[0033] As shown in FIG. 6 , the facing portion 31 has a plurality of first bars 61 and a plurality of second bars 62. The first bars 61 extend in a vertical direction Z that intersects with the axial direction (front-rear direction X). The first bars 61 are spaced apart in a left-right direction Y that intersects with both the axial direction (front-rear direction X) and the vertical direction Z. The second bars 62 extend in the left-right direction Y and intersect with the first bars 61. The second bars 62 are spaced apart in the vertical direction Z. The distance between adjacent second bars 62 in the vertical direction Z is greater than the distance between adjacent first bars 61 in the left-right direction Y. The number of second bars 62 is smaller than the number of first bars 61.

[0034] As shown in FIGS. 7 and 8 , in a cross section perpendicular to the vertical direction Z, the cross-sectional shape of the first crosspiece 61 is an ellipse with its major axis extending in the axial direction (front-rear direction X). As shown in FIG. 8 , the surface of the first crosspiece 61 on the side (−X side) where the housing 11 is located in the axial direction (front-rear direction X), i.e., the rear surface 61a, is a curved surface that convex toward the housing 11. The rear surface 61a has a substantially semi-elliptical arc shape that convex toward the rear side (−X side) when viewed in the vertical direction Z. The surface of the first crosspiece 61 on the side (+X side) opposite the side where the housing 11 is located in the axial direction (front-rear direction X), i.e., the front surface 61b, is a curved surface that convex toward the direction away from the housing 11. The front surface 61b has a substantially semi-elliptical arc shape that convex toward the front side (+X side) when viewed in the vertical direction Z.

[0035] As shown in FIG. 9 , in a cross section perpendicular to the left-right direction Y, the cross-sectional shape of the second crosspiece 62 is a substantially trapezoidal shape whose dimension in the vertical direction Z decreases toward the rear (−X side). The surface of the second crosspiece 62 on the axial side (−X side) where the housing 11 is located, i.e., the rear surface 62a, is a curved surface that convex toward the housing 11. When viewed in the left-right direction Y, the rear surface 62a has a substantially semicircular arc shape that convex toward the rear (−X side). The surface of the second crosspiece 62 on the side (+X side) opposite the side where the housing 11 is located in the front-rear direction X, i.e., the front surface 62b, is a flat surface. The front surface 62b faces the front (+X side) and is a flat surface perpendicular to the left-right direction Y.

[0036] The upper surface of the second crosspiece 62, i.e., the upper surface 62c, is an inclined surface that inclines in the vertical direction Z with respect to a plane (X-Y plane) perpendicular to the vertical direction Z. The upper surface 62c is positioned lower toward the rear (-X side). The upper surface 62c connects the upper end of the rear surface 62a and the upper end of the front surface 62b. The lower surface of the second crosspiece 62, i.e., the lower surface 62d, is an inclined surface that inclines in the vertical direction Z with respect to a plane (X-Y plane) perpendicular to the vertical direction Z. The lower surface 62d is positioned higher toward the rear. The lower surface 62d connects the lower end of the rear surface 62a and the lower end of the front surface 62b. The upper surface 62c and the lower surface 62d are inclined toward each other in the vertical direction Z with respect to the rear.

[0037] In the first embodiment, the maximum axial dimension L2 of the second crosspiece 62 (front-rear direction X) is smaller than the maximum axial dimension L1 of the first crosspiece 61 (front-rear direction X). In other words, the maximum axial dimension L1 of the first crosspiece 61 is larger than the maximum axial dimension L2 of the second crosspiece 62. The maximum axial dimension L1 of the first crosspiece 61 is equal to the major axis of the first crosspiece 61, which has an elliptical cross section. The maximum axial dimension L2 of the second crosspiece 62 is equal to the axial distance between the apex of the arc-shaped rear surface 62a and the front surface 62b when viewed in the left-right direction Y. In the first embodiment, the maximum axial dimension L1 of the first crosspiece 61 is at least twice the maximum axial dimension L2 of the second crosspiece 62.

[0038] In the first embodiment, the second crosspiece 62 is connected to the rear (-X side) portion of the first crosspiece 61. The front (+X side) end of the second crosspiece 62 is located rearward of the front end of the first crosspiece 61. In the first embodiment, the front end of the second crosspiece 62 is the front surface 62b. In the first embodiment, the front end of the second crosspiece 62, i.e., the front surface 62b, is located at the same position in the front-rear direction X as the center CL1 of the first crosspiece 61 in the axial direction (front-rear direction X). The rear end of the second crosspiece 62 is located forward of the rear end of the first crosspiece 61.

[0039] 7, the maximum dimension W2 in the vertical direction Z of the second crosspiece 62 is smaller than the maximum dimension W1 in the left-right direction Y of the first crosspiece 61. The maximum dimension W2 in the vertical direction Z of the second crosspiece 62 is equal to the dimension of the front surface 62b in the vertical direction Z. The maximum dimension W1 in the left-right direction Y of the first crosspiece 61 is equal to the dimension in the left-right direction Y at the center of the first crosspiece 61 in the axial direction (front-rear direction X).

[0040] As shown in FIG. 6 , the facing portion 31 is formed in a lattice pattern by the multiple first crosspieces 61 and the multiple second crosspieces 62 intersecting each other. The facing portion 31 is formed with multiple first ventilation holes 41 separated by the multiple first crosspieces 61 and the multiple second crosspieces 62. Each first ventilation hole 41 is a hole formed by a pair of first crosspieces 61 adjacent to each other in the left-right direction Y and a pair of second crosspieces 62 adjacent to each other in the vertical direction Z. The first ventilation holes 41 penetrate the facing portion 31 in the front-rear direction X. In the first embodiment, each of the multiple first ventilation holes 41 has a rectangular shape that is elongated in the vertical direction Z. The multiple first ventilation holes 41 are arranged in a matrix pattern. More specifically, multiple rows of the multiple first ventilation holes 41 aligned in the left-right direction Y are aligned in the vertical direction Z.

[0041] As shown in Fig. 3, the outer frame portion 36 protrudes from the outer peripheral edge of the facing portion 31 toward the housing 11. In the first embodiment, the outer frame portion 36 is a rectangular frame that protrudes rearward (toward the -X side) from the outer peripheral edge of the facing portion 31. The rear end of the outer frame portion 36 is fixed to the front wall portion 11h of the housing 11. Although not shown, the outer frame portion 36 is provided with a fixing portion that is fixed to the housing 11 with screws. The outer frame portion 36 has an upper frame portion 32, a lower frame portion 33, and a pair of side frame portions 34, 35.

[0042] The upper frame portion 32 is a portion of the outer frame portion 36 that is located above the vertical direction Z. The upper frame portion 32 is located above the rotation axis R in the vertical direction Z. The lower frame portion 33 is a portion of the outer frame portion 36 that is located below the vertical direction Z. The lower frame portion 33 is located below the rotation axis R in the vertical direction Z. The upper frame portion 32 and the lower frame portion 33 extend in the axial direction of the rotation axis R, i.e., in a direction that intersects with the vertical direction Z when viewed in the front-to-rear direction X. More specifically, the upper frame portion 32 and the lower frame portion 33 extend in the left-to-right direction Y. The upper frame portion 32 and the lower frame portion 33 are arranged opposite each other with a gap in between in the vertical direction Z. The upper frame portion 32 and the lower frame portion 33 are plate-shaped with their plate surfaces facing the vertical direction Z.

[0043] The pair of side frame portions 34, 35 are portions located in the left-right direction Y, which is perpendicular to both the vertical direction Z and the axial direction of the rotation axis R (the front-rear direction X). The pair of side frame portions 34, 35 extend in the vertical direction Z. The pair of side frame portions 34, 35 are arranged opposite each other with a gap in the left-right direction Y. The side frame portion 34 is a portion of the outer frame portion 36 located on the right side (+Y side). The side frame portion 35 is a portion of the outer frame portion 36 located on the left side (-Y side). The side frame portion 34 connects the right end of the upper frame portion 32 to the right end of the lower frame portion 33. The side frame portion 35 connects the left end of the upper frame portion 32 to the left end of the lower frame portion 33. The pair of side frame portions 34, 35 are plate-shaped with their plate surfaces facing the left-right direction Y.

[0044] In the first embodiment, the lower frame portion 33 and the pair of side frame portions 34, 35 each have an extension portion 37 extending in an intersecting direction intersecting the axial direction of the rotation axis R. That is, in the first embodiment, a plurality of extension portions 37 are provided. The lower frame portion 33 has an extension portion 37 extending in the left-right direction Y. The pair of side frame portions 34, 35 have extension portions 37 extending in the vertical direction Z. In the lower frame portion 33, the "intersecting direction" intersecting the axial direction of the rotation axis R is the left-right direction Y. In the pair of side frame portions 34, 35, the "intersecting direction" intersecting the axial direction of the rotation axis R is the vertical direction Z.

[0045] Figure 10 is a view of a portion of the housing 11 and a portion of the side frame portion 35 as viewed from the left side (-Y side). Figure 11 is a cross-sectional view showing a portion of the side frame portion 35, taken along line XI-XI in Figure 10. As shown in Figure 10, the side frame portion 35 has a plurality of third bars 63c arranged at intervals in the vertical direction Z. The multiple third bars 63c extend in the front-rear direction X.

[0046] As shown in FIG. 11 , in a cross section perpendicular to the left-right direction Y, the cross-sectional shape of the third crosspiece 63c is rectangular, having a pair of sides extending in the vertical direction Z and a pair of sides extending in the left-right direction Y. The surface of the third crosspiece 63c facing the inside (+Y side) of the outer frame portion 36, i.e., the inner surface 63d, is flat. In the side frame portion 35, the inner surface 63d of the third crosspiece 63c facing the inside of the outer frame portion 36 faces the right side (+Y side). The inner surface 63d is a flat surface perpendicular to the left-right direction Y. The surface of the third crosspiece 63c facing the outside (-Y side) of the outer frame portion 36, i.e., the outer surface 63e, is flat. In the side frame portion 35, the outer surface 63e of the third crosspiece 63c facing the outside of the outer frame portion 36 faces the left side (-Y side). The upper surface 63f of the third crosspiece 63c is a flat surface. The lower surface 63g of the third crosspiece 63c is a flat surface. The upper surface 63f and the lower surface 63g are flat surfaces that are perpendicular to the vertical direction Z.

[0047] In the first embodiment, the dimension of the third crosspiece 63c in the vertical direction Z is constant throughout the left-right direction Y. The maximum dimension W3 of the third crosspiece 63c in the vertical direction Z is greater than the maximum dimension W1 of the first crosspiece 61 in the left-right direction Y and the maximum dimension W2 of the second crosspiece 62 in the vertical direction Z. The maximum dimension W3 of the third crosspiece 63c in the vertical direction Z is equal to the dimensions of the inner surface 63d and the outer surface 63e in the vertical direction Z. The maximum dimension L3 of the third crosspiece 63c in the left-right direction Y, which intersects both the axial direction (front-rear direction X) and the vertical direction Z (the intersecting direction), is smaller than the maximum dimension L1 of the first crosspiece 61 in the front-rear direction X and the maximum dimension L2 of the second crosspiece 62 in the front-rear direction X. The maximum dimension L3 of the third crosspiece 63c in the left-rear direction Y is equal to the dimensions of the upper surface 63f and the lower surface 63g in the left-rear direction Y.

[0048] The maximum dimension L3 in the left-right direction Y of the third bar 63c may be larger than the maximum dimension L1 in the front-rear direction X of the first bar 61 and the maximum dimension L2 in the front-rear direction X of the second bar 62, or may be the same as either the maximum dimension L1 in the front-rear direction X of the first bar 61 or the maximum dimension L2 in the front-rear direction X of the second bar 62, or may be larger than the maximum dimension L2 in the front-rear direction X of the second bar 62 and smaller than the maximum dimension L1 in the front-rear direction X of the first bar 61.

[0049] A second ventilation hole 42c is formed in each of the sides of the side frame 35 between adjacent third bars 63c in the vertical direction Z. The second ventilation holes 42c are arranged side by side at intervals in the vertical direction Z. As shown in FIG. 10 , in the first embodiment, the second ventilation holes 42c are rectangular holes extending in the axial direction (front-to-rear direction X). In the side frame 35, the axial center CL2 of the second ventilation hole 42c is shifted toward the side where the housing 11 is located (the −X side), i.e., toward the rear, relative to the axial center CL3 of the side frame 35.

[0050] The cross-sectional flow area of ​​the second ventilation holes 42c is smaller than the cross-sectional flow area of ​​the first ventilation holes 41. The cross-sectional flow area of ​​the first ventilation holes 41 is the area of ​​the first ventilation holes 41 when viewed in the axial direction (front-back direction X). The cross-sectional flow area of ​​the second ventilation holes 42c is the area of ​​the second ventilation holes 42c when viewed in the left-right direction Y.

[0051] The dimension Lx2 of the second ventilation hole 42c in the axial direction (front-rear direction X) is larger than the dimension Lz2 of the second ventilation hole 42c in the vertical direction Z. The dimension Lx2 of the second ventilation hole 42c in the axial direction is smaller than the dimension Lz1 of the first ventilation hole 41 in the vertical direction Z. The dimension Lz2 of the second ventilation hole 42c in the vertical direction Z is smaller than the dimension Ly1 of the first ventilation hole 41 in the left-right direction Y. The dimension Lz2 of the second ventilation hole 42c in the vertical direction Z is equal to the distance between adjacent third bars 63c in the vertical direction Z. As shown in FIG. 6 , the dimension Lz1 of the first ventilation hole 41 in the vertical direction Z is equal to the distance between adjacent second bars 62 in the vertical direction Z. The dimension Ly1 of the first ventilation hole 41 in the left-right direction Y is equal to the distance between adjacent first bars 61 in the left-right direction Y.

[0052] As shown in FIG. 3 , the side frame portion 34 has the same configuration as the side frame portion 35, except that it is arranged symmetrically in the left-right direction Y relative to the side frame portion 35. The side frame portion 34 has a plurality of third bars 63b extending in the front-rear direction X. The plurality of third bars 63b are arranged at intervals in the vertical direction Z. A second ventilation hole 42b is formed between each pair of third bars 63b of the side frame portion 34 that are adjacent in the vertical direction Z. In the side frame portion 34, the surface of the third bars 63b that faces inward of the outer frame portion 36 faces the left side (−Y side).

[0053] The lower frame portion 33 has the same configuration as the side frame portions 35, except that the lower frame portion 33 is rotated 90° counterclockwise around the rotation axis R relative to the side frame portions 35 when viewed from the front side (+X side). The lower frame portion 33 has a plurality of third bars 63a extending in the front-rear direction X. The plurality of third bars 63a are arranged at intervals in the left-right direction Y. A second ventilation hole 42a is formed between each pair of third bars 63a adjacent to each other in the left-right direction Y of the lower frame portion 33. In the lower frame portion 33, the surface of the third bars 63a facing inward of the outer frame portion 36 is the surface facing upward.

[0054] In the following description, when there is no particular distinction between the third bars 63a, 63b, and 63c, they will be collectively referred to as the "third bars 63." Furthermore, when there is no particular distinction between the second ventilation holes 42a, 42b, and 42c, they will be collectively referred to as the "second ventilation holes 42."

[0055] In the first embodiment, the upper frame portion 32 does not have any holes such as ventilation holes formed therein, unlike the lower frame portion 33 and the pair of side frame portions 34, 35. Therefore, air AF does not pass through the upper frame portion 32. Note that the upper frame portion 32 may also have second ventilation holes 42 formed therein, similar to the lower frame portion 33 and the pair of side frame portions 34, 35.

[0056] In the first embodiment, the fan grill 30 is made of resin. The fan grill 30 is produced by a molding method using a mold, such as injection molding. The opposing portion 31, the upper frame portion 32, the lower frame portion 33, and the pair of side frame portions 34, 35 are integrally molded. The material from which the fan grill 30 is made is not particularly limited. The fan grill 30 may also be made of metal.

[0057] According to the first embodiment, the fan grill 30 includes a facing portion 31 disposed opposite the air outlet 11e in the axial direction (front-rear direction X) of the rotation axis R of the rotor blades 15a, and an outer frame portion 36 protruding from the outer peripheral edge of the facing portion 31 toward the housing 11. The facing portion 31 includes a plurality of first bars 61 extending in a vertical direction Z intersecting the axial direction and spaced apart in a left-right direction Y intersecting both the axial direction and the vertical direction Z, and a plurality of second bars 62 extending in the left-right direction Y, intersecting the plurality of first bars 61, and spaced apart in the vertical direction Z. The facing portion 31 includes a plurality of first ventilation holes 41 separated by the plurality of first bars 61 and the plurality of second bars 62. The outer frame portion 36 includes an extension portion 37 extending in a transverse direction intersecting the axial direction. The extension portion 37 includes a plurality of third bars 63 spaced apart in a transverse direction intersecting the axial direction. A second ventilation hole 42 is formed between each pair of adjacent third bars 63 in the transverse direction of the extension portion 37. The cross-sectional area of ​​the second ventilation hole 42 is smaller than the cross-sectional area of ​​the first ventilation hole 41. The maximum dimension in the transverse direction of the third bar 63, i.e., the maximum dimension W3 in the vertical direction Z of the third bar 63c, for example, is larger than the maximum dimension W1 in the left-right direction Y of the first bar 61 and the maximum dimension W2 in the vertical direction Z of the second bar 62.

[0058] According to the above configuration, by forming a plurality of second ventilation holes 42 in the extension portion 37 of the outer frame portion 36, it is possible to reduce the pressure loss of the air AF in the outer frame portion 36 compared to when the second ventilation holes 42 are not formed. This reduces the ventilation resistance of the fan grill 30 and reduces the pressure loss of the air AF passing through the fan grill 30. This therefore reduces the power consumption of the outdoor unit 10. It is also possible to reduce the noise generated when the air AF passes through the fan grill 30.

[0059] On the other hand, because the cross-sectional area of ​​the second ventilation holes 42 is smaller than that of the first ventilation holes 41, it is more difficult for air AF to pass through the second ventilation holes 42 than through the first ventilation holes 41. Furthermore, because the maximum dimension in the cross direction of the third crosspiece 63, i.e., the maximum dimension W3, for example, is larger than the maximum dimension W1 in the left-right direction Y of the first crosspiece 61 and the maximum dimension W2 in the vertical direction Z of the second crosspiece 62, air AF traveling from the inside of the outer frame portion 36 toward the extension portion 37 is more likely to be blocked by the third crosspiece 63, making it more difficult for air AF to pass through the second ventilation holes 42. As a result, the pressure loss of air AF passing through the second ventilation holes 42 in the extension portion 37 is greater than the pressure loss of air AF passing through the first ventilation holes 41 in the opposing portion 31. Therefore, the amount of air AF blown out of the housing 11 through the second ventilation holes 42 formed in the outer frame portion 36 can be reduced. This makes it possible to prevent the air AF, which passes through the second ventilation holes 42 formed in the outer frame portion 36 and is blown out of the housing 11, from being sucked again through the suction ports 11c, 11d into the housing 11. It is also possible to prevent the air AF, which passes through the second ventilation holes 42 and is blown out of the housing 11, from being sucked into the housing of another outdoor unit arranged adjacent to the outdoor unit 10, for example.

[0060] As described above, by forming the plurality of second ventilation holes 42 in the outer frame portion 36, it is possible to reduce the ventilation resistance of the fan grill 30 while suppressing the occurrence of the short cycle phenomenon. This reduces the pressure loss of the air AF passing through the fan grill 30 and suppresses a decrease in the heat exchange efficiency in the outdoor unit 10. Therefore, it is possible to suitably improve the performance of the refrigeration cycle apparatus 100.

[0061] Furthermore, according to the first embodiment, the side wall portion 11g, which is located on the left side (-Y side) in the left-right direction Y among the wall portions constituting the housing 11, has an intake port 11d. The side frame portion 35, which is the left portion of the outer frame portion 36, is an extension portion 37 extending in the vertical direction Z. Therefore, as described above, the amount of air AF blowing out to the left side from the second ventilation holes 42c formed in the side frame portion 35, which is the extension portion 37, can be reduced. This prevents the air AF blowing out to the left side from the second ventilation holes 42c formed in the side frame portion 35 from being sucked back into the intake port 11d formed in the left side wall portion 11g of the housing 11. This further prevents the short-cycle phenomenon from occurring.

[0062] Furthermore, according to the first embodiment, the side frame portion 34, which is the portion of the outer frame portion 36 located on the right side (+Y side) in the left-right direction Y, is the extension portion 37 extending in the vertical direction Z. Therefore, as described above, it is possible to reduce the amount of air AF blowing out to the right from the second ventilation holes 42b formed in the side frame portion 34, which is the extension portion 37. This makes it possible, for example, when another outdoor unit is arranged next to the right of the outdoor unit 10, to prevent the air AF blowing out to the right from the second ventilation holes 42b formed in the side frame portion 34 from being sucked into the air inlet of the other outdoor unit. This makes it possible to further prevent the short-cycle phenomenon from occurring.

[0063] Furthermore, according to the first embodiment, the first direction in which the first crosspiece 61 extends is the vertical direction Z, and the second direction in which the second crosspiece 62 extends is the left-right direction Y, which is perpendicular to the vertical direction Z. The lower frame portion 33, which is the portion of the outer frame portion 36 located below the vertical direction Z, is the extension portion 37 extending in the left-right direction Y. Therefore, as described above, the amount of air AF blowing downward from the second ventilation holes 42a formed in the lower frame portion 33, which is the extension portion 37, can be reduced. This makes it possible to prevent, for example, the air AF blowing downward from the second ventilation holes 42a formed in the lower frame portion 33 from passing below the outdoor unit 10 and being sucked back into the air inlet 11c formed on the rear surface of the housing 11. This further reduces the occurrence of the short-cycle phenomenon.

[0064] Furthermore, according to the first embodiment, the rear surface 61 a of the first bar 61, which is the surface on the side where the housing 11 is located in the axial direction (front-rear direction X), and the rear surface 62 a of the second bar 62, which is the surface on the side where the housing 11 is located in the axial direction, are curved surfaces that convex toward the housing 11. Therefore, compared to when the rear surfaces 61 a and 62 a are flat, it is easier to reduce the resistance that the air AF blown out from the air outlet 11 e of the housing 11 encounters when it hits the first bar 61 and the second bar 62. On the other hand, the inner surface 63 d of the third bar 63, which is the surface facing the inside of the outer frame portion 36, is flat. Therefore, compared to when the inner surface 63 d is curved, it is easier to increase the resistance that the air AF blown out from the air outlet 11 e of the housing 11 encounters when it hits the third bar 63 compared to when the first bar 61 and the second bar 62 encounter. This makes it easier to preferably increase the ventilation resistance in the extension portion 37 compared to the opposing portion 31, and makes it easier to preferably reduce the amount of air AF blown out from the second ventilation holes 42. Therefore, it is possible to more preferably prevent the short cycle phenomenon from occurring.

[0065] Furthermore, according to the first embodiment, the number of second crosspieces 62 is smaller than the number of first crosspieces 61. The maximum axial dimension L1 of the first crosspieces 61 (front-rear direction X) is larger than the maximum axial dimension L2 of the second crosspieces 62. This increases the axial rigidity of the first crosspieces 61 and prevents the facing portion 31 from deforming toward the housing 11. Therefore, even if a user's hand touches the fan grill 30, the user's hand can be prevented from approaching the blower fan 15. Furthermore, the provision of the second crosspieces 62 favorably improves the rigidity of the first crosspieces 61 in the left-right direction Y and prevents the first crosspieces 61 from deforming in the left-right direction Y. This prevents the first ventilation holes 41 from expanding in the left-right direction Y and from becoming large enough to accommodate, for example, the user's fingers. Furthermore, by reducing the number of second crosspieces 62 compared to the number of first crosspieces 61, an increase in ventilation resistance at the facing portion 31 can be prevented.

[0066] The front surface 61b of the first crosspiece 61, which is the surface opposite the side where the housing 11 is located in the axial direction (front-rear direction X), is a curved surface that convexly extends away from the housing 11. By making both axial surfaces of the first crosspiece 61 curved, even if the maximum axial dimension L1 of the first crosspiece 61 is increased, the resistance experienced by the air AF that comes into contact with the first crosspiece 61 is easily reduced. This makes it possible to prevent the ventilation resistance of the facing portion 31 from increasing while increasing the maximum axial dimension L1 of the first crosspiece 61. The front surface 62b of the second crosspiece 62, which is the surface opposite the side where the housing 11 is located in the axial direction, is flat. Therefore, compared to when the front surface 62b is curved, it is easier to make the maximum axial dimension L2 of the second crosspiece 62 smaller than the maximum axial dimension L1 of the first crosspiece 61. Furthermore, compared to when the front surface 62b is curved, this makes it easier to mold the fan grill 30 using a mold.

[0067] Furthermore, according to the first embodiment, in the extension portion 37, the center CL2 in the axial direction (front-rear direction X) of the second ventilation hole 42 is positioned offset toward the side where the housing 11 is located (the -X side) in the axial direction with respect to the center CL3 of the axial direction of the extension portion 37. Here, the direction of the air AF blown out from the outer frame portion 36 is more likely to be closer to the axial direction as the resistance of the air AF passing through the heat exchanger 13 decreases. In the first embodiment, the heat exchanger 13 has only one main body portion 13c, so the resistance of the air AF passing through the heat exchanger 13 tends to be relatively small. As a result, as shown in FIG. 4 , the direction of the air AFa, AFb blown out from the outer frame portion 36 tends to be closer to the axial direction. In this case, the amount of air AFb blown out from the side of the outer frame portion 36 farther from the housing 11 (the +X side) tends to be greater than the amount of air AFa blown out from the side of the outer frame portion 36 closer to the housing 11 (the -X side). Therefore, by shifting the second ventilation holes 42 toward the side where the housing 11 is located, as in the first embodiment, it becomes difficult for the relatively large volume of air AFb to pass through the second ventilation holes 42. This makes it easier to reduce the amount of air AF blown out from the second ventilation holes 42. Therefore, the occurrence of the short cycle phenomenon can be further suppressed.

[0068] Furthermore, according to the first embodiment, no ventilation holes are formed in the upper frame portion 32 of the outer frame portion 36, which is located on the upper side in the vertical direction Z. This prevents rainwater and the like from dripping through the upper frame portion 32, and prevents rainwater adhering to the upper frame portion 32 from freezing and forming icicles. This prevents icicles formed on the fan grill 30 from coming into contact with the blower fan 15. Furthermore, since there is no need to provide a separate eave to protect against rainwater, the number of parts in the outdoor unit 10 can be reduced.

[0069] Embodiment 2. Figure 12 is a partial cross-sectional view of outdoor unit 210 in embodiment 2 as seen from above. Figure 13 is a view of part of outdoor unit 210 in embodiment 2 as seen from the left side (-Y side). In the following description, the same components as those in the above-described embodiments will be denoted by the same reference numerals as appropriate, and description thereof may be omitted.

[0070] As shown in FIG. 12 , in the second embodiment, the heat exchanger 213 has a plurality of main body portions 213c. In the second embodiment, three main body portions 213c are provided. Each main body portion 213c has the same shape as the main body portion 13c in the first embodiment. The plurality of main body portions 213c are aligned in the front-rear direction X. More specifically, the plurality of main body portions 213c are arranged side by side, with the first heat exchange portions 13a aligned in the front-rear direction X and the second heat exchange portions 13b aligned in the left-right direction Y. In this way, when a plurality of main body portions 213c are provided, the resistance when the air AF passes through the heat exchanger 213 is greater than in the first embodiment.

[0071] 13 , in the fan grill 230 of the second embodiment, in the side frame portion 235 that is the extension portion 237, the center CL4 in the axial direction (front-rear direction X) of the second ventilation hole 242 is shifted to the opposite side (+X side) in the axial direction from the side on which the housing 11 is located with respect to the axial center CL3 of the side frame portion 235. The other configurations of the outdoor unit 210 are the same as the other configurations of the outdoor unit 10 of the first embodiment.

[0072] The greater the resistance of the air AF when it passes through the heat exchanger 213, the more likely it is that the direction of the air AF blown out from the outer frame portion 36 will be tilted with respect to the axial direction (front-rear direction X). In the second embodiment, as described above, the resistance of the air AF when it passes through the heat exchanger 213 is relatively large. Therefore, as shown in FIG. 12 , the directions of the air AFa and AFb blown out from the outer frame portion 236 are likely to be tilted with respect to the axial direction. In this case, the direction of the air AFa blown out from the side of the outer frame portion 236 closer to the housing 11 (-X side) is more likely to be tilted with respect to the axial direction than the direction of the air AFb blown out from the side of the outer frame portion 236 farther from the housing 11 (+X side). Therefore, by disposing the second ventilation holes 242 away from the side where the housing 11 is located, as in the second embodiment, the air AFa whose direction is tilted relatively greatly with respect to the axial direction is less likely to pass through the second ventilation holes 242. This prevents the direction of the air AF blown out from the second ventilation holes 242 from being significantly tilted relative to the axial direction. Therefore, the air AF blown out from the second ventilation holes 242 is prevented from flowing in a direction intersecting the axial direction, and is further prevented from being sucked back into the suction ports 11c, 11d. This further prevents the short cycle phenomenon from occurring.

[0073] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the configurations of the above-described embodiments, and the following configurations and methods may also be adopted.

[0074] The shape of the fan grille is not particularly limited. When viewed in the axial direction of the rotation axis, the fan grille may be circular, elliptical, or any polygonal shape other than a square. The number of extension portions provided on the outer frame portion is not particularly limited, as long as it is one or more. For example, in the first embodiment described above, one or two of the lower frame portion 33 and the pair of side frame portions 34, 35 do not have to be extension portions 37. In other words, the second ventilation holes 42 do not have to be formed in the lower frame portion 33 and one or two of the pair of side frame portions 34, 35. The intersecting direction of the extension portions is not particularly limited, as long as it intersects with the axial direction of the rotation axis of the blower fan. The cross-sectional shapes of the first bar, the second bar, and the third bar are not particularly limited.

[0075] The outer frame portion may have an extension portion in which the axial center of the second ventilation hole is shifted axially toward the housing 11 relative to the axial center of the extension portion, and an extension portion in which the axial center of the second ventilation hole is shifted axially toward the housing 11 relative to the axial center of the extension portion. For example, the lower frame portion 33 in the first embodiment may have an extension portion in which the second ventilation hole is shifted axially toward the housing 11 relative to the axial center of the extension portion, as in the side frame portion 235 in the second embodiment. The shapes of the first ventilation hole and the second ventilation hole are not particularly limited. The number of first ventilation holes and the number of second ventilation holes are each not particularly limited, as long as they are two or more.

[0076] The refrigeration cycle device according to the present disclosure is not limited to an air conditioner as long as it utilizes a refrigeration cycle in which a refrigerant circulates, and may also be a heat pump water heater or the like.

[0077] The relative positional relationships and dimensions of the components described in the above-described embodiments are merely examples, and the relative positional relationships and dimensions of the components in this disclosure are not particularly limited as long as they are within the scope of the technical concept of this disclosure. The configurations and methods described in this specification can be combined as appropriate within the scope of not mutually contradicting each other.

[0078] DESCRIPTION OF SYMBOLS 10, 210... Outdoor unit, 11... Housing, 11c, 11d... Intake port, 11e... Outlet port, 11g... Side wall portion, 15... Blower fan, 15a... Rotor, 30, 230... Fan grill, 31... Opposing portion, 33... Lower frame portion (extension portion), 34, 35... Side frame portion (extension portion), 36, 236... Outer frame portion, 37, 237... Extension portion, 41... First ventilation hole, 42, 42a, 42b, 42c, 242... Second ventilation hole, 61... First rail, 62... Second rail, 63, 63a, 63b, 63c... Third rail, 100... Refrigeration cycle device, R... Rotation axis, Y... Left-right direction (second direction), Z... Vertical direction (first direction)

Claims

1. An outdoor unit of a refrigeration cycle apparatus, comprising: a housing having an air outlet; a blower fan having rotating blades disposed inside the housing opposite to the air outlet; a fan grille covering the air outlet from outside the housing; wherein the fan grille has a facing portion disposed opposite to the air outlet in the axial direction of the rotation axis of the rotating blades, an outer frame portion protruding from the outer peripheral edge of the facing portion toward the housing, and the facing portion has a plurality of first crossbars extending in a first direction intersecting the axial direction and spaced apart in a second direction intersecting both the axial direction and the first direction, a plurality of second crossbars extending in the second direction and intersecting the plurality of first crossbars and spaced apart in the first direction, and a plurality of first ventilation holes separated by the plurality of first crossbars and the plurality of second crossbars are formed in the facing portion, the outer frame portion has an extension portion extending in an intersection direction intersecting the axial direction, the extension portion has a plurality of third crossbars spaced apart in the intersection direction, second ventilation holes are formed respectively between the third crossbars adjacent to each other in the intersection direction among the extension portions, the flow channel cross-sectional area of the second ventilation holes is smaller than the flow channel cross-sectional area of the first ventilation holes, and the maximum dimension of the third crossbar in the intersection direction is larger than the maximum dimension of the first crossbar in the second direction and the maximum dimension of the second crossbar in the first direction. An outdoor unit.

2. An air inlet is formed in a side wall portion located on a first side in the second direction among the wall portions constituting the housing, and a portion of the outer frame portion located on the first side is the extension portion extending in the first direction. The outdoor unit according to claim 1.

3. A plurality of the extension portions are provided, and a portion of the outer frame portion located on a second side in the second direction is the extension portion extending in the first direction. The outdoor unit according to claim 2.

4. The first direction is a vertical direction, the second direction is a left-right direction orthogonal to the vertical direction, and a portion of the outer frame portion located on the lower side in the vertical direction is the extension portion extending in the left-right direction. The outdoor unit according to claim 3.

5. The surface of the first crossbar on the side where the housing is located in the axial direction and the surface of the second crossbar on the side where the housing is located in the axial direction are curved surfaces convex toward the housing, and the surface of the third crossbar facing the inside of the outer frame portion is a flat surface. The outdoor unit according to claim 1.

6. The number of the second crossbars is less than the number of the first crossbars, the maximum dimension of the first crossbar in the axial direction is larger than the maximum dimension of the second crossbar in the axial direction, the surface of the first crossbar on the side opposite to the side where the housing is located in the axial direction is a curved surface that protrudes away from the housing, the surface of the second crossbar on the side opposite to the side where the housing is located in the axial direction is a flat surface. The outdoor unit according to claim 1.

7. In at least one of the extension parts, the axial center of the second ventilation hole is displaced toward the side where the housing is located in the axial direction with respect to the axial center of the extension part. The outdoor unit according to claim 1.

8. In at least one of the extension parts, the axial center of the second ventilation hole is displaced toward the side opposite to the side where the housing is located in the axial direction with respect to the axial center of the extension part. The outdoor unit according to claim 1.

9. A refrigeration cycle device including the outdoor unit according to any one of claims 1 to 8.