Heat source unit for refrigeration cycle device, and refrigeration cycle device

Abstract

A blowout grille (59) of an outdoor machine (3) of an air conditioner (1) has: radially extending connection crosspieces (70); and a plurality of concentric annular crosspieces (80) intersecting the connection crosspieces (70). The annular crosspieces (80) include first annular crosspieces (81) and second annular crosspieces (82). The first annular crosspieces (81) are disposed in a first region (61) in a direction orthogonal to the rotation axis (X1) of a blower fan (38), and the second annular crosspieces (82) are disposed in a second region (62) located closer to the outer peripheral side of the blowout grille (59) as compared with the first region (61). In a cross section that includes the rotation axis (X1), the first annular crosspieces (81) are inclined in a direction approaching the rotation axis (X1) as being separated from the blower fan (38), whereas the second annular crosspieces (82) are inclined in a direction approaching the outer periphery of the blowout fan (38) as compared with the first annular crosspieces (81) as being separated from the blower fan (38).

Description

Heat source unit and refrigeration cycle apparatus of a refrigeration cycle apparatus

[0001] Relates to a heat source unit and a refrigeration cycle apparatus of a refrigeration cycle apparatus.

[0002] There has conventionally been an outdoor unit in which an annular bar of a fan guard for an outdoor unit of an air conditioner is inclined and arranged so as to open outward (Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2007-139214)).

[0003] In a conventional outdoor unit, there is a problem that the air volume may decrease due to the generation of an air flow in the opposite direction to the blowing direction near the rotation axis of the blower fan.

[0004] The heat source unit of the refrigeration cycle apparatus according to the first aspect includes a blower fan, an air outlet, and a blowing grill. The air outlet discharges the air blown out from the blower fan to the outside. The blowing grill is arranged in the blowing direction of the blower fan and covers the air outlet. The blowing grill has connecting bars and a plurality of concentric annular bars. The connecting bars extend radially. The plurality of concentric annular bars intersect the connecting bars. The annular bar has a first annular bar and a second annular bar. The first annular bar is arranged in a first region in a direction orthogonal to the rotation axis of the blower fan. The second annular bar is arranged in a second region on the outer peripheral side of the blowing grill rather than the first region in a direction orthogonal to the rotation axis of the blower fan. In a cross section including the rotation axis, the first annular bar is inclined in a direction approaching the rotation axis as it moves away from the blower fan. In a cross section including the rotation axis, the second annular bar is inclined in a direction approaching the outer periphery of the blowing grill more than the first annular bar as it moves away from the blower fan.

[0005] In this heat source unit of the refrigeration cycle apparatus, the generation of an air flow in the opposite direction to the blowing direction of the blower fan near the rotation axis of the blower fan can be suppressed, and the air volume can be increased.

[0006] The heat source unit of the air conditioning unit in the second aspect is the heat source unit in the first aspect, and the blower fan has a boss and blades. The boss is located on the axis of rotation. The blades extend outward from the boss. The second region has a third region. The third region is located in the vicinity of the blades of the blower fan. The annular strut further has a third annular strut. The third annular strut is located in the third region.

[0007] In the heat source unit of this refrigeration cycle system, the third region is located near the blades of the blower fan, which reduces the airflow resistance of the air blown out from the third region that is close to the blower fan.

[0008] The heat source unit of the refrigeration cycle device in the third view is the heat source unit in the second view, wherein the third annular bar is inclined to move towards the outer circumference of the discharge grille as it moves away from the blower fan.

[0009] In the heat source unit of this refrigeration cycle system, the third annular support is tilted so that it moves away from the blower fan and approaches the outer circumference of the discharge grille, thus tilting in a direction that aligns with the airflow direction of the air blown out from the blower fan, and thus reducing the airflow resistance.

[0010] The heat source unit of the refrigeration cycle device in the fourth view is the heat source unit of the second or third view, wherein the annular bar has an inclination angle of 0° in the direction perpendicular to the rotation axis, an inclination angle of 90° in the direction parallel to the rotation axis, an inclination angle greater than 0° and less than 90° in the direction inclined toward the outer circumference, and an inclination angle greater than 90° and less than 180° in the direction inclined toward the boss. The second region has a fourth region. The fourth region is a region closer to the rotation axis than the third region. The annular bar further has a fourth annular bar. The fourth annular bar is included in the fourth region. The inclination angle of the fourth annular bar is smaller than the inclination angle of the first annular bar and larger than the inclination angle of the third annular bar.

[0011] In this refrigeration cycle device's heat source unit, it is possible to suppress a sudden change in the direction of air blown from the third region relative to the direction of air blown from the first region.

[0012] The heat source unit of the refrigeration cycle device in the fifth perspective is a heat source unit of either the second or fourth perspective, wherein the annular bar has an inclination angle of 0° in the direction perpendicular to the rotation axis, an inclination angle of 90° in the direction parallel to the rotation axis, an inclination angle greater than 0° and less than 90° in the direction inclined toward the outer circumference, and an inclination angle greater than 90° and less than 180° in the direction inclined toward the boss. The second region has a fifth region. The fifth region is the region on the outer circumference side of the discharge grille than the third region. The annular bar has a fifth annular bar. The fifth annular bar is included in the fifth region. The inclination angle of the fifth annular bar is greater than the inclination angle of the third annular bar.

[0013] This heat source unit of the refrigeration cycle system can improve the straightness of the airflow in the region away from the axis of rotation.

[0014] The heat source unit of the refrigeration cycle device in the sixth view is a heat source unit of any of the second to fifth views, and has multiple first annular bars and multiple third annular bars. The pitch between the third annular bars is smaller than the pitch between the first annular bars.

[0015] In this refrigeration cycle device's heat source unit, the direction of the air blown out from the blower fan can be adjusted to a consistent direction by setting a small pitch for the third ring-shaped support.

[0016] The refrigeration cycle device according to the seventh perspective comprises a heat source unit and a utilization unit. The heat source unit is the heat source unit of any of the refrigeration cycle devices according to the first to sixth perspectives. The utilization unit is connected to the heat source unit.

[0017] This refrigeration cycle device can increase airflow by suppressing the generation of airflow in the opposite direction to the blowing direction of the blower fan near the rotation axis of the blower fan.

[0018] This is a schematic diagram of the refrigerant circuit of an air conditioner having an outdoor unit employing the heat source unit according to this embodiment. This is a perspective view showing the exterior of the outdoor unit. This is a perspective view showing the outdoor unit with the fan room side plate, fan room front plate, and top plate removed. This is a plan view showing the outdoor unit with the top plate removed. This is a front view of the discharge grille. This is a magnified front view of the discharge grille. This is a diagram to explain the direction of air blown out from the fan. This is a diagram to explain the direction of air after it has passed through the discharge grille. This is a diagram showing the positional relationship between the fan and the discharge grille.

[0019] The heat source unit of the refrigeration cycle device described herein will be explained with reference to the drawings.

[0020] (1) Overall configuration of the air conditioner Figure 1 shows the configuration of the refrigerant circuit of an air conditioner 1 having an outdoor unit employing the heat source unit of the refrigeration cycle device disclosed herein. The air conditioner 1 comprises an indoor unit (a utilization unit of the refrigeration cycle device) 2 which is attached to a wall or the like inside a room, and an outdoor unit (a heat source unit of the refrigeration cycle device) 3 which is installed outside. The indoor unit 2, the outdoor unit 3, and the pipes 41 and 42 are connected to constitute the refrigerant circuit of the air conditioner 1.

[0021] The refrigerant circuit mainly consists of an indoor heat exchanger 70, an accumulator 31, a compressor 32, a four-way switching valve 33, an outdoor heat exchanger 30, and an expansion valve 34.

[0022] The indoor heat exchanger 70 installed in the indoor unit 2 performs heat exchange with the air it comes into contact with. The indoor unit 2 is also equipped with a cross-flow fan 71 for drawing in indoor air, passing it through the indoor heat exchanger 70, and discharging the air back into the room after heat exchange has taken place. This cross-flow fan 71 is configured in an elongated cylindrical shape, with its central axis positioned parallel to the horizontal. The cross-flow fan 71 is rotationally driven by an indoor fan motor 72 installed inside the indoor unit 2. The blower fan installed in the indoor unit 2 is not limited to the cross-flow fan 71; for example, a turbo fan or a sirocco fan may also be used.

[0023] The outdoor unit 3 is equipped with a compressor 32, a four-way switching valve 33 connected to the discharge side of the compressor 32, an accumulator 31 connected to the suction side of the compressor 32, an outdoor heat exchanger 30 connected to the four-way switching valve 33, and an expansion valve 34 connected to the outdoor heat exchanger 30. The expansion valve 34 is connected to piping 41 via a filter 35 and a liquid shut-off valve 36, and is connected to one end of the indoor heat exchanger 70 via this piping 41. The four-way switching valve 33 is connected to piping 42 via a gas shut-off valve 37, and is connected to the other end of the indoor heat exchanger 70 via this piping 42. The outdoor unit 3 is also equipped with a blower fan 38 for discharging the air after heat exchange in the outdoor heat exchanger 30 to the outside. This blower fan 38 is rotationally driven by a fan motor 39.

[0024] (2) Basic operation of the air conditioner The air conditioner 1 is capable of performing cooling and heating operations as its basic operation.

[0025] During cooling operation, the refrigerant discharged from the compressor 32 passes through the indoor heat exchanger 30, expansion valve 34, indoor heat exchanger 70, and accumulator 31 before being drawn back into the compressor 32.

[0026] During heating operation, the refrigerant discharged from the compressor 32 passes through the indoor heat exchanger 70, expansion valve 34, outdoor heat exchanger 30, and accumulator 31 before being drawn back into the compressor 32.

[0027] (3) Configuration of the Outdoor Unit Next, the configuration of the outdoor unit 3 of this embodiment will be described using Figures 2 to 8. Here, Figure 2 is a perspective view showing the external appearance of the outdoor unit 3. Figure 3 is a perspective view showing the outdoor unit 3 with the fan room side plate 53, the fan room side front plate 55, and the top plate 57 removed. Figure 4 is a plan view showing the outdoor unit 3 with the top plate 57 removed. In the following description, unless otherwise specified, terms indicating directions or surfaces such as "up," "down," "left," "right," "front," "side," "back," "top," and "bottom" refer to directions or surfaces when the side with the air outlet grille 59 is considered the front.

[0028] The outdoor unit 3 has a structure in which the inside of the outdoor unit casing 51 is divided into a blower room S1 and a machine room S2 by a partition plate 58 that extends vertically. The outdoor unit 3 is configured to draw in outdoor air from the back and part of the sides of the outdoor unit casing 51 and then discharge the air from the front of the outdoor unit casing 51. The outdoor unit 3 mainly consists of the outdoor unit casing 51, a compressor 32, a four-way switching valve 33, an outdoor heat exchanger 30, an expansion valve 34, shut-off valves 36 and 37, and refrigerant circuit components including piping connecting these devices (see Figure 1), a blower fan 38, and a blower fan motor 39. The blower fan 38, blower fan motor 39, motor support base 44, and bell mouth 45 are located in the blower room S1.

[0029] In this example, the blower chamber S1 is formed near the left side of the outdoor unit casing 51, and the machine chamber S2 is formed near the right side of the outdoor unit casing 51; however, the left and right sides may be reversed.

[0030] (3-1) Outdoor unit casing The outdoor unit casing 51 is formed in a roughly rectangular parallelepiped shape and mainly houses the compressor 32, the four-way switching valve 33, the outdoor heat exchanger 30, the expansion valve 34, the shut-off valves 36 and 37, and the refrigerant circuit components including the piping connecting these devices, as well as the blower fan 38 and the blower fan motor 39. The outdoor unit casing 51 has a bottom frame 52 on which various components such as the refrigerant circuit components and the blower fan 38 are placed, a machine room side plate 54, a blower room side plate 55, a machine room front plate 56, and a top plate 57.

[0031] The blower room side plate 55 is a steel plate-shaped member, and its lower part is fixed to the bottom frame 52. The blower room side plate 55 is provided with a fan outlet (air outlet) 55a at the front of the blower room S1 of the outdoor unit casing 51 for blowing out the outdoor air drawn into the outdoor unit casing 51 by the blower fan 38 to the outside. The bell mouth 45 is provided around the periphery of the air outlet 55a and extends in the front-rear direction (see Figure 4). The bell mouth 45 guides the airflow generated by the blower fan 38 and blown out to the outside. The air outlet 55a releases the air blown out from the blower fan 38 to the outside. A discharge grille 59 covering the air outlet 55a is provided on the front side of the blower room side plate 55.

[0032] The partition plate 58 is a vertically extending steel plate-like member positioned on the bottom frame 52. Here, the partition plate 58 divides the inside of the outdoor unit casing 51 into left and right sections, forming a blower room S1 on the left side and a machine room S2 on the right side. The lower part of the partition plate 58 is fixed to the bottom frame 52, its front end is fixed to the blower room side plate 55, and its rear end extends to the side end of the outdoor heat exchanger 30 near the machine room S2.

[0033] (3-2) Blower fan The blower fan 38 has a boss 38a and blades 38b. The boss 38a is located on the rotation axis X1. The blades 38b extend outward from the boss 38a.

[0034] In this embodiment, the blower fan 38 is a propeller fan with a diameter of 630 mm and having multiple blades 38b. The blower fan 38 is positioned in the blower chamber S1 on the front side of the outdoor heat exchanger 30, facing the front of the outdoor unit casing 51 (in this case, the air outlet 55a). The blower fan motor 39 is positioned in the blower chamber S1 between the blower fan 38 and the outdoor heat exchanger 30 in the front-rear direction. The blower fan motor 39 is supported by a motor support base 44 mounted on the bottom frame 52. The blower fan 38 is pivotally supported by the outdoor fan motor 39.

[0035] (3-3) Discharge Grille Figure 5 is a front view of the discharge grille 59. Figure 6 is an enlarged front view of the portion enclosed by ellipse A in Figure 5. The discharge grille 59 is a resin discharge grille and is formed by an upper end surface 59a, a lower end surface 59b, a right end surface (first side end surface) 59c, a front surface 59d, and a left end surface 59e. The discharge grille 59 is molded from flame-retardant resin. As shown in Figure 5, the front surface 59d has an outer frame (outer shape) that is approximately rectangular. The discharge grille 59 is positioned in the direction of discharge of the blower fan 38 and covers the air outlet 55a. The discharge grille 59 faces the blower fan 38 in the direction of discharge of the blower fan 38.

[0036] As shown in Figure 5, the outlet grille 59 has a central portion 59f and a mesh portion 60.

[0037] The central portion 59f corresponds to the boss 38a when viewed in the direction of the rotation axis X1.

[0038] The mesh portion 60 is the part that faces the wing 38b when viewed in the direction of the rotation axis X1. The mesh portion 60 has a first region 61 and a second region 62. The second region 62 also has a third region 63, a fourth region 64, and a fifth region 65. In the first to fifth regions 61 to 65, the mesh portion 60 has connecting struts 70 and a plurality of concentric annular struts 80. The connecting struts 70 and the annular struts 80 form the mesh portion 60.

[0039] Figure 7 is a diagram illustrating the direction of air blown out from the blower fan 38. As shown in Figure 7, the direction of the air (wind) W20 blown out to the outside of the outdoor unit 3 changes depending on the inclination angle of the annular rib 80 of the discharge grille 59. When the inclination angle of the annular rib 80 is parallel to the rotation axis X1, the direction of the air W20 blown out to the outside is rectified and approaches the inclination angle of the annular rib 80. When the annular rib 80 is inclined in the direction of the outer circumference of the discharge grille 59 (see Figure 5), the direction of the air W20 blown out to the outside of the outdoor unit 3 is in the direction of the outer circumference of the discharge grille 59.

[0040] (3-3-1) Connecting Bars The connecting bar 70 extends radially from the central portion 59f toward the outer frame side of the blowing grill 59. The connecting bar 70 extends between the first region 61 and the fifth region 65, that is, between the central portion 59f and the outer frame of the blowing grill 59, so as to connect them with a single bar. Further, the connecting bar 70 may extend so as to connect the central portion 59f and the first annular bar 81 near the outer peripheral side of the first region 61, and the first annular bar 81 near the outer periphery of the first region 61 and the outer frame of the blowing grill 59, with different bars respectively.

[0041] (3-3-2) Annular Bars A plurality of concentric annular bars 80 intersect the connecting bar 70. The annular bar 80 has the first annular bar 81 and the second annular bar 82. The second annular bar 82 has the third annular bar 83, the fourth annular bar 84, and the fifth annular bar 85.

[0042] In FIGS. 5 and 6, an example is shown in which there are 12 first annular bars 81 and 9 second annular bars 82 in the vertical direction of the blowing grill 59, but the numbers of the first annular bar 81 and the second annular bar 82 are not limited to this. Also, in FIGS. 5 and 6, an example is shown in which there are 3 third annular bars 83, 4 fourth annular bars 84, and 2 fifth annular bars 85 in the vertical direction of the blowing grill 59, but the numbers of the third annular bar 83, the fourth annular bar 84, and the fifth annular bar 85 are not limited to this.

[0043] The first annular bar 81 is arranged in the first region 61 in a direction orthogonal to the rotation axis X1 of the blower fan 38.

[0044] The second annular bar 82 is arranged in the second region 62 on the outer peripheral side of the blowing grill 59 rather than the first region 61 in a direction orthogonal to the rotation axis X1 of the blower fan 38. The outer peripheral side of the blowing grill 59 refers to the outer frame side of the blowing grill 59.

[0045] FIG. 8 is a diagram for explaining the direction of air after passing through the blowing grill 59. As shown in FIG. 8, an example will be described using the case where there are 6 first annular bars 81, 8 second annular bars 82, among which there are 3 third annular bars 83, 2 fourth annular bars 84, and 2 fifth annular bars 85.

[0046] The annular crossbar 80 has an inclination angle of 0° in the direction orthogonal to the rotation axis X1 and an inclination angle of 90° in the direction parallel to the rotation axis X1. The inclination angle in the direction inclined toward the outer peripheral direction of the blowing grill 59 is greater than 0° and less than 90°. The inclination angle in the direction inclined toward the boss 38a is greater than 90° and less than 180°.

[0047] In the cross section including the rotation axis X1, the first annular crossbar 81 is inclined in the direction approaching the rotation axis X1 as it moves away from the blower fan 38. The inclination angle of the first annular crossbar 81 is, for example, greater than 90° and less than or equal to 135°. In the present embodiment, the inclination angle of the first annular crossbar 81 is 95°. Therefore, the air W1 blown out from the blower fan 38 to the outside of the outdoor unit 3 is directed toward the rotation axis X1 by the first annular crossbar 81. Thereby, the region of the wind speed distribution W6 in the reverse direction of the blowing direction from the outdoor unit 3 can be suppressed.

[0048] In the cross section including the rotation axis X1, the second annular crossbar 82 is inclined in the direction approaching the outer periphery of the blowing grill 59 more than the first annular crossbar 81 as it moves away from the blower fan 38.

[0049] The third region 63 is located in the vicinity of the blade 38b of the blower fan 38. The third region 63 may be located at a place where the distance d between the blade 38b of the blower fan 38 and the blowing grill 59 is the shortest distance. The shortest distance means the distance at which the distance d between the blower fan 38 and the blowing grill 59 becomes the smallest toward the side where the blower fan 38 is not installed.

[0050] FIG. 9 is a diagram showing the positional relationship between the blower fan 38 and the blowing grill 59. In FIG. 9, a cross section when the blower fan 38 and the blowing grill 59 are viewed from the left side is shown. As shown in FIG. 9, in the third region 63, the distance between the blade 38b of the blower fan 38 and the blowing grill 59 is close. For example, the distance d between the blade 38b of the blower fan 38 and the third region 63 of the blowing grill 59 is 49.5 mm.

[0051] The third annular rib 83 is positioned in the third region 63. The third annular rib 83 is inclined to move towards the outer frame (outer circumference) of the discharge grille 59 as it moves away from the blower fan 38. In this embodiment, the inclination angle of the third annular rib is 85°. As shown in Figure 8, the third annular rib 83 is inclined to move towards the outer frame (outer circumference) 59a of the discharge grille 59 toward the side where the blower fan 38 is not installed (the front side in Figure 8). Where the distance d between the blades 38b of the blower fan 38 and the discharge grille 59 is close, the airflow resistance is high because the wind speed is high. Therefore, it is effective for the third annular rib 83 to be inclined toward the outer circumference.

[0052] Of the first to fifth regions 65 of the mesh portion 60 of the discharge grille 59, the third region 63 has the largest airflow, so the direction of the wind and the inclination direction of the third annular rib 83 in the third region 63 are made to be the same. Therefore, the wind W3 blown out from the blower fan 38 to the outside of the outdoor unit 3 is directed towards the outer circumference of the discharge grille 59 by the third annular rib 83.

[0053] In this embodiment, the outer frame of the air outlet grille 59 is 730 mm in the vertical direction and 726 mm in the horizontal direction. However, the size of the air outlet grille 59 is not limited to this.

[0054] The pitch P3 between the third annular battens 83 is smaller than the pitch P3 between the first annular battens 81. The dimension of the pitch P1 of the first annular battens 81 (see Figure 6) is, for example, 14 mm. The dimension of the pitch P3 of the third annular battens 83 (see Figure 6) is, for example, 10.5 mm. The dimensions of the pitch P1 of the first annular battens 81 and the pitch P3 of the third annular battens 83 are not limited to these. Note that the term "pitch" is not only used for three or more battens, but can also be used for the distance between two battens.

[0055] The fourth region 64 is the region closer to the rotation axis X1 than the third region 63. The fourth annular batten 84 is included in the fourth region 64. The inclination angle of the fourth annular batten 84 is smaller than the inclination angle of the first annular batten 81 and larger than the inclination angle of the third annular batten 83. In this embodiment, the inclination angle of the fourth annular batten is 90°. As shown in Figure 8, the fourth annular batten 84 is inclined in a direction parallel to the rotation axis X1. Therefore, the wind W4 blown out from the blower fan 38 to the outside of the outdoor unit 3 is directed in a direction parallel to the rotation axis X1 by the fourth annular batten 84.

[0056] The fifth region 65 is the region on the outer periphery of the discharge grille 59, compared to the third region 63. The annular rib 80 has a fifth annular rib 85. The fifth annular rib 85 is included in the fifth region 65. The inclination angle of the fifth annular rib 85 is greater than the inclination angle of the third annular rib 83. In this embodiment, the inclination angle of the fifth annular rib is 90°. As shown in Figure 8, the fifth annular rib 85 is inclined in a direction parallel to the rotation axis X1. Therefore, the air blown out from the blower fan 38 to the outside of the outdoor unit 3 (not shown) is directed by the fifth annular rib 85 in a direction parallel to the rotation axis X1.

[0057] (4) Features (4-1) The outdoor unit 3 of the air conditioner 1 according to this embodiment includes a blower fan 38, an air outlet 55a, and a discharge grille 59. The air outlet 55a discharges the air blown out from the blower fan 38 to the outside. The discharge grille 59 is positioned in the direction of air discharge from the blower fan 38 and covers the air outlet 55a. The discharge grille 59 has a connecting bar 70 and a plurality of concentric annular bars 80. The connecting bar 70 extends radially. The plurality of concentric annular bars 80 intersect with the connecting bar 70. The annular bars 80 have a first annular bar 81 and a second annular bar 82. The first annular bar 81 is positioned in the first region 61 in a direction perpendicular to the rotation axis X1 of the blower fan 38. The second annular rib 82 is positioned in the second region 62, which is on the outer circumference side of the discharge grille 59, in a direction perpendicular to the rotation axis of the blower fan 38, compared to the first region 61. In a cross-section including the rotation axis X1, the first annular rib 81 is inclined to move closer to the rotation axis X1 as it moves away from the blower fan 38. In a cross-section including the rotation axis X1, the second annular rib 82 is inclined to move closer to the outer circumference of the discharge grille 38 than the first annular rib 81 as it moves away from the blower fan 38.

[0058] The inventors focused on the fact that in the mesh portion 60 of the discharge grille 59, near the first region 61 on the rotation axis X1 side, there exists a wind speed distribution in the opposite direction to the direction of air blown out from the outdoor unit 3. In the outdoor unit 3 of the air conditioner 1, by tilting the inclination angle of the first annular bar 81 in the first region 61 on the rotation axis X1 side toward the rotation axis X1, the wind blown out from the first region 61 is directed toward the rotation axis X1, thereby suppressing the region of wind speed distribution in the opposite direction to the direction of air blown out from the outdoor unit 3.

[0059] In the outdoor unit 3 of this air conditioner 1, the generation of airflow in the opposite direction to the blowing direction of the blower fan 38 near the rotation axis X1 of the blower fan 38 can be suppressed, thereby increasing the airflow volume.

[0060] (4-2) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, the blower fan 38 has a boss 38a and a blade 38b. The boss 38a is located on the rotation axis X1. The blade 38b extends outward from the boss 38a. The second region 62 has a third region 63. The third region 63 is located near the blade 38b of the blower fan 38. The annular rib 80 further has a third annular rib 83. The third annular rib 83 is located in the third region 63.

[0061] In the outdoor unit 3 of this air conditioner 1, the third region 63 is located near the blade 38b of the blower fan 38, thereby reducing the airflow resistance of the air blown out from the third region 63 that is close to the blower fan 38.

[0062] (4-3) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, the third annular bar 83 is inclined to move closer to the outer circumference of the discharge grille 59 as it moves away from the blower fan 38.

[0063] In the outdoor unit 3 of this air conditioner 1, the third annular support 83 is tilted in a direction that moves closer to the outer circumference of the discharge grille 59 as it moves away from the blower fan 38, so that it is tilted in a direction that is in line with the airflow direction of the air blown out from the blower fan 38, thereby reducing the airflow resistance.

[0064] (4-4) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, the annular rib 80 has an inclination angle of 0° in the direction perpendicular to the rotation axis X1. The inclination angle of 90° in the direction parallel to the rotation axis X1. The inclination angle of greater than 0° and less than 90° in the direction inclined toward the outer circumference. The inclination angle of greater than 90° and less than 180° in the direction inclined toward the boss 38a. The second region 62 has a fourth region 64. The fourth region 64 is a region closer to the rotation axis X1 than the third region 63. The annular rib 80 further has a fourth annular rib 84. The fourth annular rib 84 is included in the fourth region 64. The inclination angle of the fourth annular rib 84 is smaller than the inclination angle of the first annular rib 81 and larger than the inclination angle of the third annular rib 83.

[0065] In this air conditioner 1's outdoor unit 3, it is possible to suppress a sudden change in the direction of air blown out from the third region 63 relative to the direction of air blown out from the first region 61.

[0066] (4-5) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, the annular bar 80 has an inclination angle of 0° in the direction perpendicular to the rotation axis X1. The inclination angle of 90° in the direction parallel to the rotation axis X1. The inclination angle of greater than 0° and less than 90° in the direction inclined toward the outer circumference. The inclination angle of greater than 90° and less than 180° in the direction inclined toward the boss 38a. The second region 62 has a fifth region 65. The fifth region 65 is a region on the outer circumference side of the discharge grille 59 than the third region 63. The annular bar 80 has a fifth annular bar 85. There may be one annular bar 80 or multiple annular bars 80. The fifth annular bar 85 is included in the fifth region 65. The inclination angle of the fifth annular bar 85 is greater than the inclination angle of the third annular bar 83.

[0067] In this air conditioner 1, the outdoor unit 3 can improve the straightness of the airflow in the region away from the rotation axis X1.

[0068] (4-6) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, there are multiple first annular bars 81 and multiple third annular bars 83. The pitch P3 between the third annular bars 83 is smaller than the pitch P1 between the first annular bars 81.

[0069] In the outdoor unit 3 of this air conditioner 1, by setting the pitch P3 of the third ring-shaped support beam 83 to a small value, the direction of the air blown out from the blower fan 38 can be adjusted to a consistent direction.

[0070] (4-7) The air conditioner 1 according to this embodiment comprises an outdoor unit 3 and an indoor unit 2. The indoor unit 2 is connected to the outdoor unit 3.

[0071] This air conditioner 1 can increase the airflow by suppressing the generation of airflow in the opposite direction to the blowing direction of the blower fan 38 near the rotation axis X1 of the blower fan 38.

[0072] (5) Modified Examples (5-1) Modified Example 1A In this embodiment, the case in which the inclination angle of the first annular rib 81 is 95°, the inclination angle of the third annular rib 83 is 85°, the inclination angle of the fourth annular rib 84 is 90°, and the inclination angle of the fifth annular rib 85 is 90° has been described, but the inclination angle of the annular rib 80 is not limited to this. For example, the inclination angle of the first annular rib 81 may be 100°, the inclination angle of the third annular rib 83 may be 80°, the inclination angle of the fourth annular rib 84 may be 90°, and the inclination angle of the fifth annular rib 85 may be 90°.

[0073] (5-2) Modification 1B In this embodiment, the case in which the air conditioner 1 has one blower fan 38 has been described, but it may also have two blower fans 38.

[0074] (5-3) Although embodiments of the present disclosure have been described above, it will be understood that various modifications to the form and details are possible without departing from the spirit and scope of the present disclosure as described in the claims.

[0075] 1 Air conditioner (refrigeration cycle device) 2 Indoor unit (utilization unit) 3 Outdoor unit (heat source unit) 38 Blower fan 38a Boss 38b Blade 55a Air outlet 59 Discharge grille 60 Mesh section 61-65 First to fifth regions 70 Connecting bar 80 Annular bar 81-85 First to fifth annular bar X1 Rotation axis

[0076] Japanese Patent Publication No. 2007-139214

Claims

1. The air supply unit comprises: a blower fan (38); an air outlet (55a) for releasing air blown out from the blower fan to the outside; and a discharge grille (59) positioned in the direction of discharge of the blower fan and covering the air outlet, wherein the discharge grille has radially extending connecting bars (70) and a plurality of concentric annular bars (80) intersecting the connecting bars, wherein the annular bars have a first annular bar (81) positioned in a first region (61) in a direction perpendicular to the rotation axis (X1) of the blower fan, and a second annular bar (82) positioned in a second region (62) on the outer circumference side of the discharge grille than the first region, and in a cross-section including the rotation axis, the first annular bar is inclined to move closer to the rotation axis as it moves away from the blower fan, and the second annular bar is inclined to move closer to the outer circumference of the discharge grille than the first annular bar as it moves away from the blower fan. A heat source unit for a refrigeration cycle system.

2. The heat source unit for a refrigeration cycle device according to claim 1, wherein the blower fan has a boss (38a) located at the axis of rotation and a blade (38b) extending outward from the boss, the second region has a third region (63) located near the blade of the blower fan, and the annular rib further has a third annular rib (83) disposed in the third region.

3. The heat source unit of the refrigeration cycle apparatus according to claim 2, wherein the third annular rib is inclined to move toward the outer circumference of the outlet grille as it moves away from the blower fan.

4. The annular batten has an inclination angle of 0° in the direction perpendicular to the rotation axis, an inclination angle of 90° in the direction parallel to the rotation axis, an inclination angle greater than 0° and less than 90° in the direction inclined toward the outer circumference, and an inclination angle greater than 90° and less than 180° in the direction inclined toward the boss, the second region has a fourth region (64) which is a region closer to the rotation axis than the third region, the annular batten further has a fourth annular batten (84) included in the fourth region, the inclination angle of the fourth annular batten is smaller than the inclination angle of the first annular batten and larger than the inclination angle of the third annular batten, the heat source unit of the refrigeration cycle device according to claim 2 or 3.

5. The annular batten has an inclination angle of 0° in the direction perpendicular to the rotation axis, an inclination angle of 90° in the direction parallel to the rotation axis, an inclination angle greater than 0° and less than 90° in the direction inclined toward the outer circumference, an inclination angle greater than 90° and less than 180° in the direction inclined toward the boss, the second region has a fifth region (65) which is a region on the outer circumference side of the discharge grille than the third region, the annular batten has a fifth annular batten (85) included in the fifth region, and the inclination angle of the fifth annular batten is greater than the inclination angle of the third annular batten, the heat source unit of the refrigeration cycle device according to any one of claims 2 to 4.

6. A heat source unit for a refrigeration cycle device according to any one of claims 2 to 5, wherein each of the first annular battens and the third annular battens is provided in a plurality, and the pitch between the third annular battens (P3) is smaller than the pitch between the first annular battens (P1).

7. A refrigeration cycle apparatus comprising: a heat source unit according to any one of claims 1 to 6; and a utilization unit connected to the heat source unit.

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