Blower, air conditioner, and refrigeration cycle device

Abstract

A blower according to the present disclosure comprises: a housing in which a suction port and a blowout port are formed; a heat exchanger disposed so as to face the suction port inside the housing; a fan disposed so as to face the blowout port inside the housing; a bell mouth that is formed in an annular shape so as to surround the peripheral edge part of the blowout port, and that is provided with a straight pipe part that surrounds the fan and a diffusion part the inner diameter of which increases in the downstream direction; a grill disposed downstream of the blowout port; and a rectification guide provided to the grill. The peripheral edge part of the blowout port is divided into a straight priority part and a diffusion priority part in the circumferential direction. The rectification guide that guides air in the straight direction is disposed in the straight priority part. Air is blown out along the diffusion part of the bell mouth at the diffusion priority part.

Description

Blower, air conditioner, and refrigeration cycle device

[0001] The present disclosure relates to a blower, an air conditioner, and a refrigeration cycle device.

[0002] In the outdoor units of conventional air conditioners, the air flow generated by the rotation of the fan is straightened in a straight direction in the straight bell-mouth pipe section and its dynamic pressure is increased, and then the air path is gradually expanded in the downstream flare section, widening the flow and restoring static pressure, thereby improving fan performance.

[0003] However, in recent years in countries such as China, there has been an increase in small installations where the outdoor unit is covered by a wall or a box to hide it from view, as shown in Figure 1. In such installations, a phenomenon known as short-cycle occurs, in which the hot air discharged from the outdoor unit flows back into the outdoor unit, causing a decrease in performance.

[0004] In particular, as mentioned above, conventionally, the aim is to improve fan performance by expanding the air flow, but if the air flow expands, it becomes more likely to short-cycle, so it is necessary to prevent the flow from expanding.

[0005] The following Patent Document 1 proposes an outdoor unit for an air conditioning system in which a guide plate is rotatably fitted into the base end of the fan shroud, and the guide plate is formed so that it protrudes most at the center and gradually decreases in protruding portion toward both ends.

[0006] Japanese Utility Model Application Publication No. Hei 4-132337

[0007] However, in the outdoor units of the conventional air conditioners described above, guide plates are positioned only in the circumferential region where short cycling is likely to occur, but because the guide plates protrude from an annular groove formed in the housing downstream of the bellmouth flare, the flow is rectified after expanding radially at the bellmouth flare, and the flow cannot be sufficiently blocked. This results in a problem in that performance degradation due to short cycling cannot be adequately prevented in blowers, air conditioners, and refrigeration cycle devices when installed in a narrow space.

[0008] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a blower, an air conditioner, and a refrigeration cycle device that can improve performance by improving short cycles.

[0009] The blower according to the present disclosure includes a housing having an inlet and an outlet formed therein, a heat exchanger disposed inside the housing facing the inlet, a fan disposed inside the housing facing the outlet, a bellmouth formed in an annular shape surrounding the periphery of the outlet and including a straight pipe portion surrounding the fan and a diffusion portion whose inner diameter increases downstream, a grill disposed downstream of the outlet, and a flow guide provided on the grill, wherein the periphery of the outlet is divided into a straight-flow priority portion and a diffusion-priority portion in the circumferential direction, the straight-flow priority portion includes a flow guide that guides air in a straight direction, and the diffusion-priority portion blows air along the diffusion portion of the bellmouth.An air conditioner according to the present disclosure includes the above-described blower.A refrigeration cycle apparatus according to the present disclosure includes the above-described blower.

[0010] According to the present disclosure, it is possible to provide a blower, an air conditioner, and a refrigeration cycle device that can improve performance by improving short cycles.

[0011] 13 is a perspective view showing an outdoor unit of a comparative example installed in a narrow space. FIG. 14 is a perspective view showing an outdoor unit of a comparative example installed in a narrow space. FIG. 15 is a plan view showing a short cycle that occurs in an outdoor unit installed in a narrow space. FIG. 16 is a front view showing an outdoor unit according to embodiment 1. FIG. 17 is a side view showing an outdoor unit according to embodiment 1. FIG. 18 is a perspective view showing an outdoor unit according to embodiment 1. FIG. 19 is a cross-sectional view of the vicinity of the bell mouth. FIG. 19 is a perspective view of the front grille as seen from the rear side. FIG. 20 is a cross-sectional view illustrating the air flow in the diffusion priority section. FIG. 21 is a cross-sectional view illustrating the air flow in the straight-line priority section. FIG. 22 is a plan view illustrating the air flow in the outdoor unit according to embodiment 2. FIG. 23 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit shown in FIG. 12. FIG. 24 is a perspective view of an outdoor unit according to embodiment 2. FIG. 25 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit shown in FIG. 13. FIG. 26 is a perspective view of an outdoor unit according to embodiment 2. FIG. 27 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit shown in FIG. 16. FIG. 28 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit according to embodiment 5. FIG. 29 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit according to embodiment 5. FIG. 29 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit according to embodiment 6. FIG. 29 is a cross-sectional view of the vicinity of the bell mouth of the outdoor unit according to embodiment 6. Fig. 10 is a cross-sectional view of the vicinity of the bell mouth of an outdoor unit according to Embodiment 7. Fig. 11 is a cross-sectional view of the vicinity of the bell mouth of an outdoor unit according to Embodiment 7. Fig. 12 is a front view of an outdoor unit according to Embodiment 8. Fig. 13 is a cross-sectional side view of an outdoor unit according to Embodiment 8.

[0012] Hereinafter, embodiments will be described with reference to the drawings. Common or corresponding elements in each drawing are designated by the same reference numerals, and descriptions thereof will be simplified or omitted. When angles are referred to in this disclosure, if there is a reflex angle and a minor angle whose sum is 360 degrees, this generally refers to the minor angle. If there is an acute angle and an obtuse angle whose sum is 180 degrees, this generally refers to the acute angle. Furthermore, the configurations shown in the following embodiments are examples of the technical ideas of the present disclosure, and may be combined with other known technologies, or multiple technical ideas described in the present disclosure may be combined. Furthermore, parts of the configurations may be omitted or modified without departing from the spirit of the present disclosure.

[0013] A blower according to the present disclosure can be applied to an outdoor unit of an air conditioner. The outdoor unit has a compressor that compresses a refrigerant and an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air. The indoor unit (not shown) of the air conditioner has an indoor heat exchanger that exchanges heat between the refrigerant and indoor air. The outdoor unit and the indoor unit are combined to form a refrigeration cycle device (not shown).

[0014] 1 and 2 are perspective views showing an outdoor unit 100 installed in a narrow space. As shown in these figures, the outdoor unit 100 installed in a narrow space is covered by a wall 104 or a box. A front grille 101 is provided on the front of the outdoor unit 100. FIG. 3 is a plan view showing short cycles that occur in the outdoor unit 100 installed in a narrow space. As shown in FIG. 3, the outdoor heat exchanger 102 provided in the outdoor unit 100 is L-shaped in plan view. Air intakes on the housing of the outdoor unit 100 are formed on the side opposite the machine chamber 103 and on the back. The outdoor heat exchanger 102 is positioned to face these air intakes.

[0015] Of the air discharged from the front grille 101, the air discharged from the portion close to the machinery compartment 103 tends to flow in a straight line. Therefore, low-temperature outside air can be drawn in through the gap between the wall 104 and the machinery compartment 103.

[0016] In contrast, the air discharged from the front grille 101 near the outdoor heat exchanger 102 has low linearity. This is because the air intake is close, causing a short cycle. When a short cycle occurs, the high-temperature air discharged from the front grille is directly sucked into the outdoor heat exchanger 102 through the intake, deteriorating performance.

[0017] Embodiment 1. Fig. 4 is a front view showing the outdoor unit 1 according to embodiment 1. Fig. 5 is a side view showing the outdoor unit 1 according to embodiment 1. As shown in Figs. 4 and 5, an intake port 2a and an exhaust port 2b are formed in the housing 2 of the outdoor unit 1. The intake port 2a is formed on the side surface of the housing 2 opposite the machine compartment and on the back surface. The exhaust port 2b is formed on the front surface of the housing 2. The exhaust port 2b has a circular shape. A front grille 7 is arranged downstream of the exhaust port 2b.

[0018] The heat exchanger 3 is disposed inside the housing 2 so as to face the air inlet 2a. The fan 4 is disposed inside the housing 2 so as to face the air outlet 2b.

[0019] The peripheral edge of the air outlet 2b is divided into a straight-line priority portion 5 and a diffusion-priority portion 6 in the circumferential direction. In the illustrated example, the straight-line priority portion 5 corresponds to approximately half the circumference centered on the closest position 2c between the heat exchanger 3 and the air outlet 2b. The diffusion-priority portion 6 corresponds to approximately the remaining half the circumference. In this embodiment, the straight-line priority portion 5 and the diffusion-priority portion 6 are each divided into half the circumference, but this configuration is not limiting, and the straight-line priority portion 5 may be a region larger than the half circumference centered on the closest position 2c, or may be a region smaller than the half circumference centered on the closest position 2c.

[0020] Fig. 6 is a perspective view showing the outdoor unit 1 according to Embodiment 1. Fig. 7 is a cross-sectional view of the vicinity of the bell mouth 8. Fig. 8 is a perspective view of the front grille 7 as viewed from the rear side. The outdoor unit 1 has a bell mouth 8 formed in an annular shape so as to surround the peripheral edge of the air outlet 2b. As shown in Fig. 7, the bell mouth 8 has a straight pipe section 8a that surrounds the fan 4 and a diffusion section 8b whose inner diameter increases downstream. The inner diameter of the straight pipe section 8a of the bell mouth 8 is constant along the direction of the rotational axis of the fan 4.

[0021] As shown in FIG. 8 , a flow straightening guide 9 is provided on the front grille 7. The flow straightening guide 9 has a semicircular outer shape centered on the rotation axis of the fan 4. The inner diameter of the flow straightening guide 9 is constant along the direction of the rotation axis of the fan 4. The inner diameter of the flow straightening guide 9 is preferably equal to the inner diameter of the straight pipe section 8 a of the bell mouth 8. The flow straightening guide 9 is preferably formed so as to extend the straight pipe section 8 a downstream. In the illustrated example, the flow straightening guide 9 that guides air in a straight direction is arranged in the straight-flow priority section 5. In the diffusion priority section 6, the flow straightening guide 9 is not present, and air is blown out along the diffusion section 8 b of the bell mouth 8.

[0022] Fig. 9 is a cross-sectional view illustrating the air flow in the diffusion priority section 6. Fig. 10 is a cross-sectional view illustrating the air flow in the straight-line priority section 5. Figs. 9 and 10 are cross-sectional views cut along a plane including the rotation axis of the fan 4. Fig. 11 is a plan view illustrating the air flow in the outdoor unit 1 according to embodiment 1.

[0023] As shown in Fig. 9, in the diffusion priority section 6, there is no flow straightening guide 9, and the air blown out from the air outlet 2b is released while spreading along the diffusion section 8b of the bell mouth 8. This makes it possible to reduce pressure loss, as shown by arrow A in Fig. 11.

[0024] As shown in Figure 10, in the straight-line priority section 5, the air blown out from the air outlet 2b is prevented from spreading by the flow straightening guide 9, and is blown out in a straight line. This improves the straightness of the air, as shown by arrow B in Figure 11, and prevents short cycles. In this way, with this embodiment, the blown air that would normally spread out due to the bell mouth 8 is straightened in a straight line by the straight-line priority section 5 having the flow straightening guide 9, thereby preventing short cycles. As a result, performance can be improved even when installed in a narrow space.

[0025] Embodiment 2 Next, a second embodiment will be described with reference to Figures 12 and 13. The description will focus on the differences from the first embodiment described above, and the description of the commonalities will be simplified or omitted. Elements that are common to or correspond to the elements described above will be given the same reference numerals.

[0026] Fig. 12 is a perspective view of the outdoor unit 1 according to the second embodiment. Fig. 13 is a cross-sectional view of the vicinity of the bell mouth 8 of the outdoor unit 1 shown in Fig. 12. In Fig. 12, the front grille 7 is not shown for ease of viewing. As shown in Fig. 13, the flow straightening guide 9 in this embodiment is arranged so that the straight pipe portion 8a of the bell mouth 8 extends downstream. The length of the flow straightening guide 9 in the direction of the rotational axis of the fan 4 gradually decreases from the center of the flow straightening guide 9 towards both ends.

[0027] In this embodiment, the length of the flow straightening guide 9 in the rotational axis direction of the fan 4 is increased at the position where the heat exchanger 3, which is most susceptible to short cycling, and the downstream opening of the bell mouth 8 are closest, thereby improving straightness, and at other positions, pressure loss is suppressed, making it possible to reduce deterioration of the fan input.

[0028] As described above, in this second embodiment, short cycle countermeasures are implemented to a minimum extent, deterioration of fan input is suppressed, performance is improved when installed in a narrow space, and deterioration of performance when installed in an open space can also be reduced.

[0029] Embodiment 3 Next, a third embodiment will be described with reference to Figures 14 and 15. The description will focus on the differences from the first embodiment described above, and the description of the commonalities will be simplified or omitted. Elements that are common to or correspond to the elements described above will be denoted by the same reference numerals.

[0030] FIG. 14 is a perspective view of an outdoor unit 1 according to Embodiment 3. FIG. 15 is a cross-sectional view of the vicinity of the bell mouth 8 of the outdoor unit 1 shown in FIG. 14. In FIG. 14, the front grille 7 is not shown for clarity. As shown in FIG. 15, the airflow straightening guide 9 in this embodiment is arranged so that the straight pipe portion 8a of the bell mouth 8 extends downstream. The radius of the airflow straightening guide 9 gradually increases from the center of the airflow straightening guide 9 toward both ends. That is, at the position where the downstream opening of the bell mouth 8 is closest to the heat exchanger 3, which is most susceptible to short-cycle flow, the radius of the airflow straightening guide 9 is equal to the inner diameter of the straight pipe portion 8a of the bell mouth 8. At other positions, the radius of the airflow straightening guide 9 is larger than the inner diameter of the straight pipe portion 8a of the bell mouth 8.

[0031] In this embodiment, at the position where the heat exchanger 3, which is most susceptible to short cycling, is closest to the downstream opening of the bell mouth 8, the radius of the flow straightening guide 9 is made equal to the inner diameter of the straight pipe section 8a of the bell mouth 8, improving straightness, and at other positions, pressure loss can be suppressed, reducing deterioration of fan input.

[0032] As described above, in this third embodiment, short cycle countermeasures are implemented to a minimum extent, and deterioration of fan input is suppressed, improving performance in narrow installations, while also minimizing deterioration in performance in open installations.

[0033] 16 and 17, a fourth embodiment will be described, focusing on differences from the first embodiment described above, and explanations of commonalities will be simplified or omitted. Elements common to or corresponding to the elements described above will be denoted by the same reference numerals.

[0034] FIG. 16 is a perspective view of an outdoor unit 1 according to Embodiment 4. FIG. 17 is a cross-sectional view of the vicinity of the bell mouth 8 of the outdoor unit 1 shown in FIG. 16. In FIG. 16, the front grille 7 is not shown for clarity. As shown in FIG. 17, the flow straightening guide 9 in this embodiment is arranged so that the straight pipe portion 8a of the bell mouth 8 extends downstream. The flow straightening guide 9 in this embodiment also has a straight portion 9a parallel to the straight pipe portion 8a and an expanded inner diameter portion 9b whose inner diameter expands downstream. The angle between the straight portion 9a and the expanded inner diameter portion 9b gradually increases from the center of the flow straightening guide 9 toward both ends. At the position where the downstream opening of the bell mouth 8 is closest to the heat exchanger 3, which is most susceptible to short-cycle flow, the angle between the straight portion 9a and the expanded inner diameter portion 9b may be 180 degrees. That is, the expanded inner diameter portion 9b may be integrated with the straight portion 9a.

[0035] In this embodiment, at the position where the heat exchanger 3, which is most susceptible to short cycling, and the downstream opening of the bell mouth 8 are closest, the angle of the expanded inner diameter portion 9 b of the flow straightening guide 9 is brought closer to the straight portion 9 a, thereby improving straightness, and at other positions, pressure loss can be suppressed, thereby reducing deterioration of fan input.

[0036] As described above, in this third embodiment, short cycle countermeasures are implemented to a minimum extent, and deterioration of fan input is suppressed, improving performance in narrow installations, while also minimizing deterioration in performance in open installations.

[0037] Fifth Embodiment Next, a fifth embodiment will be described with reference to Fig. 18. The description will focus on the differences from the first embodiment described above, and the description of the commonalities will be simplified or omitted. Elements that are common to or correspond to the elements described above will be given the same reference numerals.

[0038] 18 and 19 are cross-sectional views of the vicinity of the bell mouth 8 of the outdoor unit 1 according to embodiment 5. As shown in Fig. 18, the housing 2 is provided with a front panel 2d that forms the periphery of the air outlet 2b. The front grille 7 has a protruding portion 7a that contacts the front panel 2d at a position on the outer periphery side of the flow straightening guide 9 of the straight-line priority portion 5. The protruding portion 7a is inclined so as to be positioned inward toward the downstream side.

[0039] It is desirable for the airflow rectifying guide 9 to be in contact with the bell mouth 8, but because the bell mouth 8 has a curvature at the flared portion, i.e., the diffusion portion 8b, it can be difficult to make the airflow rectifying guide 9 contact the bell mouth 8 in manufacturing. This can result in a gap between the bell mouth 8 and the airflow rectifying guide 9, which can lead to air leakage. Therefore, as shown in Figure 19, air leakage can be prevented by making the front grille protrusion 7a contact the portion of the front panel 2d, which is relatively easy to contact with the ground. Furthermore, the inclined protrusion 7a rectifies the air that flows to the outside of the airflow rectifying guide 9 toward the center, reducing short cycles.

[0040] As described above, in this fifth embodiment, the manufacturability of the blower, the air conditioner, and the refrigeration cycle device can be improved, and the flow leaking from the straightening guide 9 can be straightened by the protrusion 7a that is in contact with the front panel 2d, thereby improving the short cycle and improving the performance when installed in a narrow space.

[0041] 20 and 21, a sixth embodiment will be described. The description will focus on the differences from the first embodiment, and the description of the commonalities will be simplified or omitted. Elements that are common to or correspond to the elements described above will be denoted by the same reference numerals.

[0042] 20 and 21 are cross-sectional views of the vicinity of the bell mouth 8 of the outdoor unit 1 according to Embodiment 6. As shown in Fig. 20, the housing 2 is provided with a front panel 2d that forms the periphery of the air outlet 2b. The flow straightening guide 9 has a curved portion 9c that curves along the diffusion portion 8b of the bell mouth 8. The flow straightening guide 9 also has an extension portion 9d that extends the straight pipe portion 8a of the bell mouth 8, and a contact portion 9e that contacts the front panel 2d. The inner diameter of the extension portion 9d is equal to the inner diameter of the straight pipe portion 8a.

[0043] As mentioned above, because the bell mouth 8 has a curvature at the diffusion section 8b, it may be difficult in manufacturing to bring the flow straightening guide 9 into contact with the bell mouth 8. For this reason, as shown in Figure 20, a slight gap may form between the flow straightening guide 9 and the bell mouth 8. In this embodiment, by providing the curved section 9c, this gap gradually becomes smaller from the inlet toward the back, and the flow straightening guide 9 comes into contact with the front panel 2d.

[0044] In this embodiment, air leakage can be prevented by bringing the air flow guide 9 into contact with the front panel 2d at the front panel 2d, which is relatively easy to contact, as shown in Fig. 21. At that time, by gradually reducing the gap between the air flow guide 9 and the bell mouth 8, air leaking outside from the air flow guide 9 can be minimized.

[0045] As described above, the blower, air conditioner, and refrigeration cycle apparatus of the sixth embodiment can improve manufacturability and reduce leakage from the flow straightening guide 9.

[0046] Embodiment 7 Next, embodiment 7 will be described with reference to Figures 22 and 23. The description will focus on the differences from embodiment 1 described above, and the description of the commonalities will be simplified or omitted. Furthermore, the same reference numerals will be used to designate elements that are common to or correspond to the elements described above.

[0047] 22 and 23 are cross-sectional views of the vicinity of the bell mouth 8 of the outdoor unit 1 according to Embodiment 7. As shown in these figures, in the present embodiment, in the straight-line priority section, the bell mouth 8 and the front grille 7 are integrally formed, and the straight pipe section 8a of the bell mouth 8 extends to the front grille 7.

[0048] As mentioned above, if the bell mouth 8 and the airflow straightening guide 9 are manufactured separately, gaps will form due to manufacturing issues, which could result in leakage. In contrast, in this embodiment, the part corresponding to the airflow straightening guide 9, the bell mouth 8, and the front grille 7 are integrally molded, which increases the straightness of the blown air, eliminates leakage, and reduces noise caused by gaps.

[0049] In this embodiment, in the diffusion priority portion, the bell mouth 8 and the front grille 7 may not be integrally formed, and the bell mouth 8 may have the diffusion portion 8b.

[0050] As described above, the blower, air conditioner, and refrigeration cycle device of the seventh embodiment can improve short cycles and reduce noise by eliminating leakage.

[0051] Embodiment 8 Next, an eighth embodiment will be described with reference to Figures 24 and 25. The description will focus on the differences from the first embodiment described above, and the description of the commonalities will be simplified or omitted. Elements that are common to or correspond to the elements described above will be given the same reference numerals.

[0052] Fig. 24 is a front view of the outdoor unit 1 according to embodiment 8. Fig. 25 is a cross-sectional side view of the outdoor unit 1 according to embodiment 8. As shown in Fig. 24 , the diameter (maximum diameter) of the bell mouth 8 is larger than the vertical and horizontal lengths of the grill 7. Each of the four positions where the four sides of the grill 7 and the outer edge of the bell mouth 8 are close to each other corresponds to the straight-line priority section 5, and a flow straightening guide 9 is arranged linearly along one side of the grill 7. Positions other than these four positions correspond to the diffusion priority section, and an arc-shaped guide provided along the outer edge of the bell mouth 8 connects the flow straightening guides 9 arranged at these four positions.

[0053] The blower, air conditioner, and refrigeration cycle apparatus according to the eighth embodiment described above can improve short cycles.

[0054] It should be noted that, among the features of the above-described multiple embodiments, two or more features that can be combined may be combined and implemented.

[0055] DESCRIPTION OF SYMBOLS 1 Outdoor unit, 2 Housing, 2a Intake port, 2b Outlet port, 2c Closest position, 2d Front panel, 3 Heat exchanger, 4 Fan, 5 Straight-flow priority section, 6 Diffusion priority section, 7 Front grill, 7a Protrusion, 8 Bell mouth, 8a Straight pipe section, 8b Diffusion section, 9 Flow rectifying guide, 9a Straight section, 9b Enlarged inner diameter section, 9c Curved section, 9d Extension section, 9e Contact section, 100 Outdoor unit, 101 Front grill, 102 Outdoor heat exchanger, 103 Machine room, 104 Wall

Claims

1. A housing having an intake port and an outlet port formed therein, A heat exchanger is positioned inside the housing facing the intake port, A fan is positioned inside the housing facing the air outlet, A bell mouth is formed in an annular shape to surround the periphery of the aforementioned outlet, and comprises a straight pipe section surrounding the fan and a diffusion section whose inner diameter expands toward the downstream side. A grille positioned downstream of the aforementioned air outlet, A rectifier guide provided in the aforementioned grille, Equipped with, The peripheral edge of the aforementioned outlet is divided in the circumferential direction into a straight-line priority portion and a diffusion priority portion. In the aforementioned straight-line priority section, the straightening guide is arranged to guide the air in a straight-line direction. In the diffusion priority section, air is blown out along the diffusion section of the bell mouth. The flow straightening guide is a blower formed to extend the straight pipe section downstream.

2. The blower according to claim 1, wherein the length of the straightening guide in the direction of the rotation axis of the fan gradually decreases from the center to both ends of the straightening guide.

3. The blower according to claim 1 or claim 2, wherein the radius of the straightening guide gradually increases from the center to both ends of the straightening guide.

4. The flow straightening guide has a straight section parallel to the straight pipe section and an inner diameter expanding section whose inner diameter increases towards the downstream direction. The blower according to claim 1 or claim 2, wherein the angle between the straight section and the inner diameter enlargement section gradually increases from the center to both ends of the flow straightening guide.

5. The housing includes a panel that forms the periphery of the air outlet, The grille has a protrusion that contacts the panel at a position on the outer periphery side of the straight-line priority section's airflow guide, The blower according to claim 1 or claim 2, wherein the protruding portion is inclined to be inward toward the downstream side.

6. The blower according to claim 1 or claim 2, wherein the straightening guide has a curved portion that curves along the diffusion portion of the bell mouth.

7. The diameter of the bell mouth is greater than the vertical and horizontal lengths of the grille, At four locations where the four sides of the grille and the outer edge of the bell mouth are in close proximity, the rectifier guide is formed linearly along one side of the grille. The blower according to claim 1 or claim 2, wherein the four locations are the straight-line priority sections and the straightening guide is arranged therein.

8. An air conditioner equipped with a blower according to claim 1 or claim 2.

9. A refrigeration cycle apparatus comprising a blower according to claim 1 or claim 2.