Heat source unit for refrigeration cycle device and refrigeration cycle device

Abstract

In conventional outdoor units, airflow in the opposite direction to the blowing direction may occur near the rotation axis of the blower fan, resulting in a decrease in air volume. [Solution] An outlet grille 59 of an outdoor unit 3 of an air conditioner 1 has connecting bars 70 extending radially and a plurality of concentric annular bars 80 that intersect with the connecting bars 70. The annular bars 80 have a first annular bar 81 and a second annular bar 82. The first annular bar 81 is arranged in a first region 61 in a direction perpendicular to the rotation axis X1 of the blower fan 38, and the second annular bar 82 is arranged in a second region 62 that is closer to the outer periphery of the outlet grille 59 than the first region 61. In a cross section including the rotation axis X1, the first annular bar 81 is inclined in a direction approaching the rotation axis X1 as it moves away from the blower fan 38, and the second annular bar 82 is inclined in a direction approaching the outer periphery of the outlet grille 38 more than the first annular bar 81 as it moves away from the blower fan 38.

Description

[Technical Field]

[0001] The present invention relates to a heat source unit for a refrigeration cycle device and a refrigeration cycle device. [Background technology]

[0002] BACKGROUND ART There have conventionally existed outdoor units in which the annular bars of the fan guard for the outdoor unit of an air conditioner are arranged at an angle so as to open outward (Patent Document 1 (JP 2007-139214 A)). Summary of the Invention [Problem to be solved by the invention]

[0003] Conventional outdoor units have a problem in that airflow in the opposite direction to the blowing direction occurs near the rotation axis of the blower fan, which can reduce the air volume. [Means for solving the problem]

[0004] A heat source unit of a refrigeration cycle device according to a first aspect includes a blower fan, an air outlet, and an outlet grill. The air outlet discharges air blown out from the blower fan to the outside. The outlet grill is disposed in the direction of airflow from the blower fan and covers the air outlet. The outlet grill has a connecting bar and a plurality of concentric annular bars. The connecting bar extends radially. The plurality of concentric annular bars intersect with the connecting bar. The annular bars include a first annular bar and a second annular bar. The first annular bar is disposed in a first region in a direction perpendicular to the rotational axis of the blower fan. The second annular bar is disposed in a second region closer to the outer periphery of the outlet grill than the first region in a direction perpendicular to the rotational axis of the blower fan. In a cross section including the rotational axis, the first annular bar is inclined in a direction approaching the rotational 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 outlet grille more than the first annular bar as it becomes farther away from the blower fan.

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

[0006] A heat source unit of an air conditioner of a second aspect is the heat source unit of the first aspect, wherein the blower fan has a boss and blades. The boss is located at the rotation axis. The blades extend in an outer circumferential direction from the boss. The second region has a third region. The third region is located near the blades of the blower fan. The annular bar further has a third annular bar. The third annular bar is arranged in the third region.

[0007] In the heat source unit of this refrigeration cycle apparatus, the third area is located near the blades of the blower fan, so that the ventilation resistance of the air blown out from the third area close to the blower fan is reduced.

[0008] A heat source unit of a refrigeration cycle device according to a third aspect is the heat source unit according to the second aspect, wherein the third annular bar is inclined in a direction approaching the outer periphery of the outlet grille as it becomes farther away from the blower fan.

[0009] In the heat source unit of this refrigeration cycle device, the third annular crosspiece is inclined in a direction approaching the outer periphery of the outlet grill as it moves away from the blower fan, so that it is inclined in a direction that follows the airflow direction of the air blown out from the blower fan, thereby reducing ventilation resistance.

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

[0011] In the heat source unit of this refrigeration cycle apparatus, it is possible to prevent the direction of the air blown out from the third area from suddenly changing relative to the direction of the air blown out from the first area.

[0012] A heat source unit of a refrigeration cycle device of a fifth aspect is the heat source unit of any one of the second aspect to the fourth aspect, wherein the annular bar has an inclination angle of 0° in a direction perpendicular to the rotation axis. The inclination angle in a direction parallel to the rotation axis is 90°. The inclination angle in a direction inclined toward the outer periphery is greater than 0° and less than 90°. The inclination angle in a direction inclined toward the boss is greater than 90° and less than 180°. The second region has a fifth region. The fifth region is a region closer to the outer periphery of the outlet 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] In the heat source unit of this refrigeration cycle device, the straightness of the airflow in the area in the direction away from the rotation axis can be improved.

[0014] A heat source unit of a refrigeration cycle device according to a sixth aspect is the heat source unit according to any one of the second aspect to the fifth aspect, further comprising a plurality of first annular bars and a plurality of third annular bars, the pitch between the third annular bars being smaller than the pitch between the first annular bars.

[0015] In the heat source unit of this refrigeration cycle apparatus, the pitch of the third annular bars is set small, so that the direction of the air blown out from the blower fan can be aligned in a fixed direction.

[0016] A refrigeration cycle apparatus according to a seventh aspect includes a heat source unit and a utilization unit. The heat source unit is the heat source unit of the refrigeration cycle apparatus according to any one of the first aspect to the sixth aspect. The utilization unit is connected to the heat source unit.

[0017] This refrigeration cycle device can suppress the generation of airflow in the direction opposite to the blowing direction of the blower fan near the rotation axis of the blower fan, thereby increasing the air volume. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic diagram of a refrigerant circuit of an air conditioner having an outdoor unit in which a heat source unit according to the present embodiment is used. [Figure 2] FIG. 2 is a perspective view showing the appearance of the outdoor unit. [Figure 3] FIG. 2 is a perspective view showing the outdoor unit with the fan chamber side panel, the fan chamber side front panel, and the top panel removed. [Figure 4] FIG. 2 is a plan view showing the outdoor unit with the top plate removed. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 4 is a diagram illustrating the direction of air blown out from the blower fan. [Figure 8] 10A and 10B are diagrams for explaining the direction of air after passing through an outlet grille. [Figure 9] 4A and 4B are diagrams illustrating the positional relationship between a blower fan and an outlet grille. DETAILED DESCRIPTION OF THE INVENTION

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

[0020] (1) Overall configuration of air conditioner The configuration of a refrigerant circuit of an air conditioner 1 having an outdoor unit that employs a heat source unit of a refrigeration cycle device of the present disclosure is shown in Fig. 1. The air conditioner 1 comprises an indoor unit (a utilization unit of the refrigeration cycle device) 2 that is attached to a wall or the like indoors, and an outdoor unit (a heat source unit of the refrigeration cycle device) 3 that is installed outdoors. The refrigerant circuit of the air conditioner 1 is configured by connecting the indoor unit 2, the outdoor unit 3, and pipes 41 and 42.

[0021] The refrigerant circuit is mainly composed 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 .

[0022] An indoor heat exchanger 70 provided in the indoor unit 2 exchanges heat with the air it comes into contact with. The indoor unit 2 is also provided with a cross-flow fan 71 that draws in indoor air, passes it through the indoor heat exchanger 70 for heat exchange, and then discharges the air into the room. This cross-flow fan 71 is configured in a long, thin cylindrical shape and is positioned so that its central axis is parallel to the horizontal direction. The cross-flow fan 71 is driven to rotate by an indoor fan motor 72 provided in the indoor unit 2. The blower fan provided in the indoor unit 2 is not limited to the cross-flow fan 71, and may be, for example, a turbo fan or a sirocco fan.

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

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

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

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

[0027] (3) Outdoor unit configuration 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 appearance of the outdoor unit 3. Figure 3 is a perspective view showing the outdoor unit 3 with the blower chamber side side plate 53, blower chamber side front plate 55, and 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, terms indicating directions or surfaces such as "upper," "lower," "left," "right," "front," "side," "rear," "top," and "bottom" refer to directions or surfaces when the surface on the outlet grille 59 side is considered the front, unless otherwise specified.

[0028] The outdoor unit 3 has a structure in which the interior of the outdoor unit casing 51 is divided into a blower chamber S1 and a machine chamber S2 by a partition plate 58 extending vertically. The outdoor unit 3 is configured to draw outdoor air into the interior from the back and part of the side 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 includes the outdoor unit casing 51, refrigerant circuit components (see FIG. 1 ) including the compressor 32, four-way switching valve 33, outdoor heat exchanger 30, expansion valve 34, shut-off valves 36 and 37, and piping connecting these devices, as well as 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 arranged in the blower chamber S1.

[0029] Here, an example is described in which 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, but the left and right may be reversed.

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

[0031] The blower chamber side plate 55 is a steel plate-like member, and its lower part is fixed to the bottom frame 52. The blower chamber side plate 55 is provided with a fan outlet (air outlet) 55a at the front part of the blower chamber 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 on the periphery of the air outlet 55a and extends in the front-to-rear direction (see FIG. 4). The bell mouth 45 guides the air flow generated by the blower fan 38 and blown out to the outside. The air outlet 55a discharges the air blown out from the blower fan 38 to the outside. An outlet grill 59 that covers the air outlet 55a is provided on the front side of the blower chamber side plate 55.

[0032] The partition plate 58 is a steel plate-like member extending in the vertical direction and disposed on the bottom frame 52. Here, the partition plate 58 divides the interior of the outdoor unit casing 51 into left and right halves, thereby forming a fan chamber S1 near the left side and a machine chamber S2 near the right side. The partition plate 58 has a lower portion fixed to the bottom frame 52, a front end portion fixed to the fan chamber side plate 55, and a rear end portion extending to the side end portion of the outdoor heat exchanger 30 near the machine chamber 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 radially outward from the boss 38a.

[0034] In this embodiment, the blower fan 38 is a propeller fan with a diameter of 630 mm and including multiple blades 38b. The blower fan 38 is disposed in the blower chamber S1 at a position on the front side of the outdoor heat exchanger 30 so as to face the front surface of the outdoor unit casing 51 (here, the air outlet 55a). The blower fan motor 39 is disposed in the blower chamber S1 between the blower fan 38 and the outdoor heat exchanger 30 in the front-to-rear direction. The blower fan motor 39 is supported by a motor support base 44 placed on the bottom frame 52. The blower fan 38 is axially supported by the outdoor fan motor 39.

[0035] (3-3) Exhaust grill FIG. 5 is a front view of the outlet grill 59. FIG. 6 is an enlarged front view of the portion surrounded by ellipse A in FIG. 5. The outlet grill 59 is made of resin and is formed by an upper end face 59a, a lower end face 59b, a right end face (first side end face) 59c, a front face 59d, and a left end face 59e. The outlet grill 59 is molded from a flame-retardant resin. As shown in FIG. 5, the front face 59d has a substantially rectangular outer frame (outer shape). The outlet grill 59 is disposed in the direction of air discharge from the blower fan 38 and covers the air outlet 55a. The outlet grill 59 faces the blower fan 38 in the direction of air discharge from the blower fan 38.

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

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

[0038] The mesh portion 60 is a portion that faces the blades 38b when viewed from 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 has a third region 63, a fourth region 64, and a fifth region 65. The mesh portion 60 has a connecting bar 70 and a plurality of concentric annular bars 80 in the first region 61 to the fifth region 65. The connecting bar 70 and the annular bars 80 form the mesh portion 60.

[0039] FIG. 7 is a diagram illustrating the direction of air blown out from the blower fan 38. As shown in FIG. 7, the direction of air (wind) W10 blown out from the blower fan 38 as wind W20 blown out to the outside of the outdoor unit 3 changes depending on the inclination angle of the annular crosspiece 80 of the outlet grille 59. When the inclination angle of the annular crosspiece 80 is parallel to the rotation axis X1, the direction of the wind W20 blown out to the outside is rectified and approaches the inclination angle of the annular crosspiece 80. When the annular crosspiece 80 is inclined toward the outer periphery of the outlet grille 59 (see FIG. 5), the direction of the wind W20 blown out to the outside of the outdoor unit 3 is the direction of the outer periphery of the outlet grille 59.

[0040] (3-3-1) Connecting crosspiece The connecting bars 70 extend radially from the central portion 59f toward the outer frame of the outlet grill 59. The connecting bars 70 extend between the first region 61 and the fifth region 65, in other words, between the central portion 59f and the outer frame of the outlet grill 59, so as to connect with a single bar. The connecting bars 70 may also extend with different bars between the central portion 59f and the first annular bar 81 near the outer periphery of the first region 61 and between the first annular bar 81 near the outer periphery of the first region 61 and the outer frame of the outlet grill 59.

[0041] (3-3-2) Circular crosspiece A plurality of concentric annular bars 80 intersect with the connecting bars 70. The annular bars 80 include a first annular bar 81 and a second annular bar 82. The second annular bar 82 includes a third annular bar 83, a fourth annular bar 84, and a fifth annular bar 85.

[0042] 5 and 6 show an example in which there are twelve first annular bars 81 and nine second annular bars 82 in the vertical direction of the outlet grille 59, but the numbers of the first annular bars 81 and the second annular bars 82 are not limited to this. Also, while Figures 5 and 6 show an example in which there are three third annular bars 83, four fourth annular bars 84, and two fifth annular bars 85 in the vertical direction of the outlet grille 59, the numbers of the third annular bars 83, the fourth annular bars 84, and the fifth annular bars 85 are not limited to this.

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

[0044] The second annular crosspiece 82 is disposed in a second region 62 that is closer to the outer periphery of the outlet grill 59 than the first region 61 in a direction perpendicular to the rotation axis X1 of the blower fan 38. The outer periphery of the outlet grill 59 refers to the outer frame side of the outlet grill 59.

[0045] Fig. 8 is a diagram for explaining the direction of air after passing through the outlet grill 59. As shown in Fig. 8, an example will be explained in which there are six first annular bars 81, eight second annular bars 82, and among the second annular bars 82, there are three third annular bars 83, two fourth annular bars 84, and two fifth annular bars 85.

[0046] The inclination angle of the annular crosspiece 80 in the direction perpendicular to the rotation axis X1 is 0°. The inclination angle in the direction parallel to the rotation axis X1 is 90°. The inclination angle in the direction inclined toward the outer periphery of the outlet grille 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 a cross section including the rotation axis X1, the first annular bar 81 is inclined in a direction approaching the rotation axis X1 as it moves away from the blower fan 38. The inclination angle of the first annular bar 81 is, for example, greater than 90° and equal to or less than 135°. In this embodiment, the inclination angle of the first annular bar 81 is 95°. Therefore, the wind 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 bar 81. This makes it possible to suppress the region of wind speed distribution W6 in the opposite direction to the direction of air blown out from the outdoor unit 3.

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

[0049] The third region 63 is located near the blades 38b of the blower fan 38. The third region 63 may be located at a location where the distance d between the blades 38b of the blower fan 38 and the outlet grill 59 is the shortest. The shortest distance refers to the distance where the distance d between the blower fan 38 and the outlet grill 59 is 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 outlet grill 59. Fig. 9 shows a cross section of the blower fan 38 and the outlet grill 59 as viewed from the left side. As shown in Fig. 9, the blades 38b of the blower fan 38 are close to the outlet grill 59 in the third region 63. For example, the distance d between the blades 38b of the blower fan 38 and the third region 63 of the outlet grill 59 is 49.5 mm.

[0051] The third annular crosspiece 83 is disposed in the third region 63. The third annular crosspiece 83 is inclined in a direction approaching the outer frame (periphery) of the outlet grill 59 as it moves away from the blower fan 38. In this embodiment, the inclination angle of the third annular crosspiece is 85°. As shown in FIG. 8, the third annular crosspiece 83 is inclined in a direction approaching the outer frame (periphery) 59a of the outlet grill 59 toward the side where the blower fan 38 is not installed (the front side in FIG. 8). In areas where the distance d between the blades 38b of the blower fan 38 and the outlet grill 59 is short, the wind speed is high, resulting in high ventilation resistance. Therefore, it is effective for the third annular crosspiece 83 to be inclined toward the outer periphery.

[0052] Of the first to fifth regions 61 to 65 of the mesh portion 60 of the outlet grille 59, the volume of air passing through the third region 63 is the largest, so the direction of the airflow and the inclination direction of the third annular crosspiece 83 of the third region 63 are set to be the same. Therefore, the air W3 blown out from the blower fan 38 to the outside of the outdoor unit 3 is directed toward the outer periphery of the outlet grille 59 by the third annular crosspiece 83.

[0053] In this embodiment, the outer frame of the outlet grille 59 is 730 mm in the vertical direction and 726 mm in the horizontal direction, but the size of the outlet grille 59 is not limited to this. The pitch P3 between the third annular bars 83 is smaller than the pitch P3 between the first annular bars 81. The dimension of the pitch P1 (see FIG. 6) of the first annular bars 81 is, for example, 14 mm. The dimension of the pitch P3 (see FIG. 6) of the third annular bars 83 is, for example, 10.5 mm. The dimensions of the pitch P1 of the first annular bars 81 and the pitch P3 of the third annular bars 83 are not limited to these. The expression "pitch" is not limited to three or more bars, but can also be used to refer to the distance between two bars.

[0054] The fourth region 64 is a region closer to the rotation axis X1 than the third region 63. The fourth annular bar 84 is included in the fourth region 64. The inclination angle of the fourth annular bar 84 is smaller than the inclination angle of the first annular bar 81 and larger than the inclination angle of the third annular bar 83. In this embodiment, the inclination angle of the fourth annular bar is 90°. As shown in FIG. 8 , the fourth annular bar 84 is inclined in a direction parallel to the rotation axis X1. Therefore, the fourth annular bar 84 causes the wind W4 blown out from the blower fan 38 to flow in a direction parallel to the rotation axis X1.

[0055] The fifth region 65 is a region closer to the outer periphery of the outlet grille 59 than the third region 63. The annular crosspiece 80 has a fifth annular crosspiece 85. The fifth annular crosspiece 85 is included in the fifth region 65. The inclination angle of the fifth annular crosspiece 85 is greater than the inclination angle of the third annular crosspiece 83. In this embodiment, the inclination angle of the fifth annular crosspiece is 90°. As shown in FIG. 8 , the fifth annular crosspiece 85 is inclined in a direction parallel to the rotation axis X1. Therefore, the fifth annular crosspiece 85 directs the air (not shown) blown out from the blower fan 38 to the outside of the outdoor unit 3 in a direction parallel to the rotation axis X1.

[0056] (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 an outlet grill 59. The air outlet 55a discharges air blown out from the blower fan 38 to the outside. The outlet grill 59 is disposed in the direction of airflow from the blower fan 38 and covers the air outlet 55a. The outlet grill 59 includes a connecting bar 70 and multiple concentric annular bars 80. The connecting bar 70 extends radially. The multiple concentric annular bars 80 intersect with the connecting bar 70. The annular bar 80 includes a first annular bar 81 and a second annular bar 82. The first annular bar 81 is disposed in a first region 61 in a direction perpendicular to the rotation axis X1 of the blower fan 38. The second annular bar 82 is disposed in a second region 62 that is closer to the outer periphery of the outlet grill 59 than the first region 61 in a direction perpendicular to the rotation axis X1 of the blower fan 38. In a cross section including the rotation axis X1, the first annular crosspiece 81 is inclined in a direction approaching 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 crosspiece 82 is inclined in a direction approaching the outer periphery of the outlet grille 38 more than the first annular crosspiece 81 as it moves away from the blower fan 38.

[0057] The inventors noticed that in the mesh portion 60 of the outlet grille 59, near the first region 61 on the rotation axis X1 side, there is an air velocity distribution in the opposite direction to the direction of air being 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 crosspiece 81 in the first region 61 on the rotation axis X1 side in a direction approaching the rotation axis X1, the air blown out from the first region 61 is directed toward the rotation axis X1, thereby making it possible to suppress the region with the air velocity distribution in the opposite direction to the direction of air being blown out from the outdoor unit 3.

[0058] In the outdoor unit 3 of this air conditioner 1, the generation of airflow in the direction opposite to the blowing direction of the blower fan 38 near the rotation axis X1 of the blower fan 38 is suppressed, and the air volume can be increased.

[0059] (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 blades 38b. The boss 38a is located on the rotation axis X1. The blades 38b extend in the outer circumferential direction from the boss 38a. The second region 62 has a third region 63. The third region 63 is located near the blades 38b of the blower fan 38. The annular crosspiece 80 further has a third annular crosspiece 83. The third annular crosspiece 83 is arranged in the third region 63.

[0060] In the outdoor unit 3 of this air conditioner 1, the third area 63 is located near the blades 38b of the blower fan 38, so that the ventilation resistance of the air blown out from the third area 63 close to the blower fan 38 is low.

[0061] (4-3) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, the third annular crosspiece 83 is inclined in a direction approaching the outer periphery of the outlet grille 59 as it moves away from the blower fan .

[0062] In the outdoor unit 3 of this air conditioner 1, the third annular crosspiece 83 is inclined in a direction approaching the outer periphery of the outlet grille 59 as it moves away from the blower fan 38, so that it is inclined in a direction along the airflow direction of the air blown out from the blower fan 38, thereby reducing ventilation resistance.

[0063] (4-4) 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 a direction perpendicular to the rotation axis X1. The inclination angle in a direction parallel to the rotation axis X1 is 90°. The inclination angle in the direction inclined toward the outer periphery 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°. 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 bar 80 further has a fourth annular bar 84. The fourth annular bar 84 is included in the fourth region 64. The inclination angle of the fourth annular bar 84 is smaller than the inclination angle of the first annular bar 81 and larger than the inclination angle of the third annular bar 83.

[0064] In the outdoor unit 3 of this air conditioner 1, the direction of the air blown out from the third area 63 can be prevented from suddenly changing relative to the direction of the air blown out from the first area 61.

[0065] (4-5) In the outdoor unit 3 of the air conditioner 1 according to this embodiment, the annular crosspiece 80 has an inclination angle of 0° in a direction perpendicular to the rotation axis X1. The inclination angle in a direction parallel to the rotation axis X1 is 90°. The inclination angle in the direction inclined toward the outer periphery 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°. The second region 62 has a fifth region 65. The fifth region 65 is a region closer to the outer periphery of the outlet grille 59 than the third region 63. The annular crosspiece 80 has a fifth annular crosspiece 85. There may be one annular crosspiece 80, or there may be multiple annular crosspieces. The fifth annular crosspiece 85 is included in the fifth region 65. The inclination angle of the fifth annular crosspiece 85 is greater than the inclination angle of the third annular crosspiece 83.

[0066] In the outdoor unit 3 of this air conditioner 1, the straightness of the airflow in the area in the direction away from the rotation axis X1 can be improved.

[0067] (4-6) The outdoor unit 3 of the air conditioner 1 according to this embodiment has a plurality of first annular bars 81 and a plurality of 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.

[0068] In the outdoor unit 3 of this air conditioner 1, by setting the pitch P3 of the third annular crosspiece 83 to be small, the direction of the air blown out from the blower fan 38 can be aligned in a fixed direction.

[0069] (4-7) The air conditioner 1 according to this embodiment includes an outdoor unit 3 and an indoor unit 2. The indoor unit 2 is connected to the outdoor unit 3.

[0070] This air conditioner 1 can suppress the generation of air currents in the direction opposite to the blowing direction of the blower fan 38 near the rotation axis X1 of the blower fan 38, thereby increasing the air volume.

[0071] (5) Variations (5-1) Variation 1A In this embodiment, the inclination angle of the first annular bar 81 is 95°, the inclination angle of the third annular bar 83 is 85°, the inclination angle of the fourth annular bar 84 is 90°, and the inclination angle of the fifth annular bar 85 is 90° has been described, but the inclination angles of the annular bars 80 are not limited to these. For example, the inclination angle of the first annular bar 81 may be 100°, the inclination angle of the third annular bar 83 may be 80°, the inclination angle of the fourth annular bar 84 may be 90°, and the inclination angle of the fifth annular bar 85 may be 90°.

[0072] (5-2) Variation 1B In this embodiment, the air conditioner 1 has been described as having one blower fan , but it may have two blower fans .

[0073] (5-3) Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as defined in the claims. [Explanation of symbols]

[0074] 1. Air conditioner (refrigeration cycle device) 2 Indoor unit (use unit) 3 Outdoor unit (heat source unit) 38 Blower fan 38a Boss 38b wings 55a Air outlet 59 Outlet Grill 60 Amibe 61~65 1st~5th area 70 Connecting bar 80 Circular crosspiece 81~85 1st~5th circular piers X1 Rotation axis [Prior art documents] [Patent documents]

[0075] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-139214

Claims

1. A blower fan (38); an air outlet (55a) for discharging the air blown out from the blower fan to the outside; an outlet grill (59) disposed in the blowing direction of the blower fan and covering the air outlet; Equipped with The outlet grille has a radially extending connecting bar (70) and a plurality of concentric annular bars (80) that intersect with the connecting bar, The annular crosspiece includes a first annular crosspiece (81) arranged in a first region (61) in a direction perpendicular to a rotation axis (X1) of the blower fan, and a second annular crosspiece (82) arranged in a second region (62) on the outer periphery side of the outlet grille relative to the first region, In a cross section including the rotation axis, the first annular bar is inclined in a direction approaching the rotation axis as it becomes farther from the blower fan, the second annular bar is inclined in a direction closer to the outer periphery of the outlet grille than the first annular bar as it becomes farther from the blower fan; Heat source unit for refrigeration cycle equipment.

2. The blower fan has a boss (38a) located at the rotation axis and blades (38b) extending in an outer circumferential direction from the boss, The second region has a third region (63) located near the blades of the blower fan, The annular bar further includes a third annular bar (83) disposed in the third region. The heat source unit of the refrigeration cycle apparatus according to claim 1.

3. the third annular bar is inclined in a direction approaching the outer periphery of the outlet grille as it becomes farther from the blower fan; The heat source unit of the refrigeration cycle apparatus according to claim 2.

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

5. the annular bar has an inclination angle of 0° in a direction perpendicular to the rotation axis, an inclination angle of 90° in a direction parallel to the rotation axis, an inclination angle of greater than 0° and less than 90° in a direction inclined toward the outer periphery, and an inclination angle of greater than 90° and less than 180° in a direction inclined toward the boss, The second region has a fifth region (65) which is a region closer to the outer periphery of the outlet grille than the third region, The annular crosspiece has a fifth annular crosspiece (85) included in the fifth region, The inclination angle of the fifth annular bar is greater than the inclination angle of the third annular bar. The heat source unit of the refrigeration cycle apparatus according to claim 2 or 3.

6. The first annular bars and the third annular bars are each provided in plural, The pitch (P3) between the third annular bars is smaller than the pitch (P1) between the first annular bars. The heat source unit of the refrigeration cycle apparatus according to claim 2 or 3.

7. A heat source unit of the refrigeration cycle apparatus according to any one of claims 1 to 3; a utilization unit connected to the heat source unit; A refrigeration cycle device comprising:

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