WO2021250889A1 - Outdoor unit of air conditioning device - Google Patents
Outdoor unit of air conditioning device Download PDFInfo
- Publication number
- WO2021250889A1 WO2021250889A1 PCT/JP2020/023211 JP2020023211W WO2021250889A1 WO 2021250889 A1 WO2021250889 A1 WO 2021250889A1 JP 2020023211 W JP2020023211 W JP 2020023211W WO 2021250889 A1 WO2021250889 A1 WO 2021250889A1
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- WIPO (PCT)
- Prior art keywords
- ridge line
- outdoor unit
- side region
- region
- air
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/18—Heat exchangers specially adapted for separate outdoor units characterised by their shape
Definitions
- This disclosure relates to an outdoor unit of an air conditioner equipped with a bell mouth.
- Patent Document 1 discloses an outdoor unit of an air conditioner equipped with a bell mouth.
- the bell mouth is provided on the upstream side of the mainstream of air, is formed by a bent surface, and has a reduced pipe diameter that narrows from the upstream side to the downstream side of the mainstream air, and a straight pipe portion connected to the downstream of the reduced portion. And have.
- the radius of curvature of the reduced portion is changed in the circumferential direction to prevent the bell mouth from interfering with the heat exchanger.
- the air flow is contracted at the contracted portion, which causes contraction at the straight pipe portion, which may cause a vortex on the inner surface of the straight pipe portion.
- the length of the reduced portion along the mainstream direction of air is the length of the straight pipe portion along the mainstream direction of air.
- the turning angle for turning to is increased.
- the present disclosure is to solve the above-mentioned problems, and an object of the present disclosure is to provide an outdoor unit of an air conditioner capable of suppressing the occurrence of pressure loss in a bell mouth.
- the outdoor unit of the air conditioner of the present disclosure has a heat exchanger, an axial flow fan that generates an air flow attracted to the heat exchanger, and an opening through which the air passes, and the heat exchanger is provided.
- the bell mouth is provided with an annular bell mouth, and the bell mouth has a first tapered portion in which the inner diameter on the upstream side into which the air flows is larger than the inner diameter on the downstream side, and a straight line extending from the first tapered portion to the downstream side.
- the first tapered portion has a pipe portion, and the first tapered portion is connected to the first bent portion forming the air inlet and the straight pipe portion, and has a second bent portion having an inner diameter smaller than that of the first bent portion. It has a portion, a connecting portion connected to the first bent portion and the second bent portion, and an inner surface extending linearly, and at least a part of the said portion along the direction of the axis of the straight pipe portion.
- the length of the first tapered portion is longer than the length of the straight pipe portion along the direction of the axis.
- the first tapered portion has a connecting portion whose inner surface extends linearly, and the length of at least a part of the first tapered portion along the direction of the axis of the straight pipe portion is straight. It is longer than the length of the straight pipe portion along the direction of the pipe portion axis. That is, the first tapered portion, which is a reduced portion, has a linear inner surface, and the distance of the flow path of the first tapered portion in the mainstream direction of air is the flow path of the straight pipe portion in the mainstream direction of air. Greater than the distance.
- the contraction of the air flow in the first taper portion is smoothed, and even when air in a direction different from the mainstream direction of air flows into the first taper portion, the first taper portion is used.
- the part can be smoothly turned in the mainstream direction of air. Therefore, according to the configuration of the present disclosure, it is possible to suppress the substantially narrowing of the air flow path in the straight pipe portion due to the generation of the vortex in the straight pipe portion, so that the air conditioning capable of suppressing the pressure loss in the bell mouth is possible.
- the outdoor unit of the device can be provided.
- FIG. 1 is a top view which showed typically an example of the internal structure of the outdoor unit of the air conditioner which concerns on embodiment. It is the schematic which showed the part of the cross section of the bell mouth of FIG. 1 enlarged. It is a schematic diagram which shows the relationship between the 1st radius of curvature and the 1st central angle in the 1st ridge line which concerns on embodiment. It is a schematic diagram which shows the relationship between the 1st radius of curvature and the 2nd radius of curvature in the 1st taper part which concerns on embodiment.
- FIG. 3 is an enlarged schematic view showing a first cross section and a second cross section of the bell mouth of FIG. 1.
- FIG. 1 is a top view schematically showing an example of the internal structure of the outdoor unit 100 of the air conditioner according to the embodiment.
- the inflow direction of mainstream air when the outdoor unit 100 is driven is indicated by a white block arrow
- the inflow direction of air flowing from a direction different from the inflow direction of mainstream air is a dot pattern block. It is indicated by an arrow.
- each component of the outdoor unit 100 may differ from the actual one.
- the positional relationship between the constituent members of the outdoor unit 100 for example, the positional relationship such as up / down, left / right, front / back, etc., is, in principle, the positional relationship when the outdoor unit 100 is installed in a usable state.
- the same members or parts or similar members or parts are designated by the same reference numerals or omitted.
- the outdoor unit 100 has a housing 10 that houses a heat exchanger 1, an axial fan 3, and a compressor 5.
- the housing 10 is formed, for example, by combining a plurality of sheet metal panels and the like.
- the housing 10 is provided with an opening 10a that communicates with the inside of the housing 10. As shown in FIG. 1, the opening 10a is arranged, for example, on the front surface of the housing 10. Further, a grill 10b that covers the opening 10a is arranged in the housing 10.
- the heat exchanger 1 exchanges heat between the air flow passing through the heat exchanger 1 and the refrigerant flowing inside the heat exchanger 1.
- the heat exchanger 1 includes, for example, an air-cooled heat exchange such as a fin-and-tube heat exchanger including a plurality of plate-shaped fins arranged in parallel and a plurality of heat transfer tubes penetrating the plurality of plate-shaped fins. Vessel 1 is used.
- the heat exchanger 1 has an L-shape in a top view, having a first portion 1a arranged on the rear surface side of the housing 10 and a second portion 1b arranged on the left surface side of the housing 10. It is formed as a heat exchanger 1 of.
- the L-shaped heat exchanger 1 is merely an example of the heat exchanger 1, and the heat exchanger 1 may have another shape.
- the axial flow fan 3 is arranged between the heat exchanger 1 and the opening 10a provided in the housing 10.
- the axial flow fan 3 for example, a propeller fan or the like is used.
- the axial flow fan 3 includes a plurality of blades 3a that generate an air flow by rotation, a hub 3b that supports and rotates the plurality of blades 3a, a shaft 3c whose tip is connected to the hub 3b, and a terminal of the shaft 3c. It has a motor 3d which is connected to and rotates the shaft 3c.
- the tip of the shaft 3c of the axial flow fan 3 is arranged so as to face the direction of the opening 10a.
- the motor 3d for example, a three-phase induction motor or a DC brushless motor in which the rotation speed of the shaft 3c can be controlled by a voltage is used.
- the compressor 5 compresses the sucked low-pressure refrigerant and discharges it as a high-pressure refrigerant.
- a rotary compressor or a scroll compressor is used as the compressor 5, for example, a rotary compressor or a scroll compressor is used.
- the compressor 5 is connected to the heat exchanger 1 by a refrigerant pipe.
- a partition plate 15 is installed inside the housing 10.
- the inside of the housing 10 is divided into a blower room 15a and a machine room 15b by a partition plate 15.
- a heat exchanger 1 and an axial fan 3 are arranged in the blower room 15a, and a compressor 5 is arranged in the machine room 15b.
- the partition plate 15 is formed as a plate-shaped member having a single linear cross section in FIG. 1, it can be a plate-shaped member having a cross section of another shape.
- the partition plate 15 may be a plate-shaped member having one or more curved cross sections or a plate-shaped member having a plurality of linear cross sections, or a plate having both a linear cross section and a curved cross section. It may be a shaped member.
- the partition plate 15 can be omitted depending on the application of the outdoor unit 100 and the like.
- the outdoor unit 100 includes a bell mouth 20 housed in the housing 10.
- the bell mouth 20 is an annular member having an air passage for guiding the air flow generated by the rotation of the axial flow fan 3 to the opening 10a.
- the bell mouth 20 is connected to the housing 10 at the front surface of the housing 10, for example, at the peripheral edge of the opening 10a provided in the front panel.
- the bell mouth 20 is formed integrally with the front panel of the housing 10 by, for example, plastically deforming the sheet metal by press working or the like.
- the inflow port 20a of the bell mouth 20 into which the air generated by the rotation of the axial flow fan 3 flows is shown.
- the first cross section 20b of the bell mouth 20 located between the second portion 1b of the heat exchanger 1 and the axial flow fan 3, and the position between the axial flow fan 3 and the partition plate 15.
- the second cross section 20c of the bell mouth 20 is shown.
- the bell mouth 20 is formed so as to guide the air sucked into the housing 10 to the axial flow fan 3 and optimize the inflow angle of the air flow to the blade 3a.
- the axial flow fan 3 is surrounded by the bell mouth 20 and housed inside the housing 10. By surrounding the axial fan 3 with the bell mouth 20, a part of the axial fan 3 is housed in the bell mouth 20, so that the width of the outdoor unit 100 in the front-rear direction can be reduced. Other structures of the bell mouth 20 will be described later.
- the air outside the outdoor unit 100 is attracted to the inside of the housing 10 by the rotation of the axial fan 3, for example, the inside of the blower room 15a, and heat exchange is performed by the heat exchanger 1. Will be. Further, the air inside the outdoor unit 100 that has been heat-exchanged by the heat exchanger 1 is sent to the outside of the outdoor unit 100 via the bell mouth 20, the opening 10a of the housing 10, and the grill 10b by the rotation of the axial flow fan 3. Is exhausted to.
- FIG. 2 is an enlarged schematic view showing a part of a cross section of the bell mouth 20 of FIG.
- the cross section of FIG. 2 is a cross section cut along the axis AX of the straight pipe portion 21 described later.
- the direction of the axis 3c of the axial flow fan 3 in FIG. 1 is indicated by a black block arrow.
- the mainstream direction of the air flow is indicated by a white block arrow.
- the bell mouth 20 has a straight pipe portion 21 and a first tapered portion 23 connected to the straight pipe portion 21 on the upstream side in the mainstream direction of the air flow.
- the straight pipe portion 21 has an end portion 21a on the side of the heat exchanger 1 and an end portion 21b on the side of the opening 10a of the housing 10.
- the inner surface of the straight pipe portion 21 is linear, and the straight pipe portion 21 extends from the end portion 21a to the end portion 21b with the axis AX indicated by the alternate long and short dash line as the center.
- the inner diameter is the same.
- the extending direction of the axis AX of the straight pipe portion 21 is substantially parallel to the mainstream direction of the air flow. Further, as shown in FIG.
- the direction of the shaft 3c of the axial flow fan 3 can be designed to be substantially parallel to the mainstream direction of the air flow and the extending direction of the shaft AX of the straight pipe portion 21.
- the straight pipe portion 21 is arranged on the outer peripheral side of the blade 3a of the axial flow fan 3.
- the first tapered portion 23 is a reduced pipe whose inner diameter decreases from upstream to downstream in the mainstream direction of air flow.
- the first tapered portion 23 is arranged on the upstream side of the straight pipe portion 21 and on the downstream side of the heat exchanger 1 in the mainstream direction of the air flow. That is, the first tapered portion 23 is connected to the end portion 21a of the straight pipe portion 21 on the side of the heat exchanger 1.
- the detailed structure of the first tapered portion 23 will be described later.
- the air flowing along the inner surface of the first tapered portion 23 is referred to as sidestream air.
- the bell mouth 20 can be provided with a second tapered portion 25 which is connected between the straight pipe portion 21 and the opening 10a of the housing 10 and whose inner diameter increases from the straight pipe portion 21 toward the opening 10a.
- the second tapered portion 25 has an end portion 25b on the side of the heat exchanger 1 and an end portion 25a on the side of the opening 10a of the housing 10.
- the second tapered portion 25 is an expansion pipe whose inner diameter increases from the end portion 25b arranged on the upstream side toward the end portion 25a arranged on the downstream side in the mainstream direction of the air flow.
- the second tapered portion 25 is arranged on the downstream side of the straight pipe portion 21 and on the upstream side of the opening 10a of the housing 10. That is, the end portion 25b of the second tapered portion 25 is connected to the end portion 21b of the straight pipe portion 21. Further, the end portion 25a of the second tapered portion 25 is connected to the edge of the housing 10, for example, the opening 10a of the front panel of the housing 10.
- the second opening diameter D2 of the downstream end 25a of the second tapered portion 25 can be formed to be larger than the first opening diameter D1 of the upstream end 23a1 of the first tapered portion 23.
- the first opening diameter D1 is the distance between the shaft AX and the end portion 23a1 of the first tapered portion 23, and is the radius of the inner diameter of the first tapered portion 23 at the end portion 23a1.
- the second opening diameter D2 is the distance between the shaft AX and the end portion 25a of the second tapered portion 25, and is the radius of the inner diameter of the second tapered portion 25 at the end portion 25a.
- the bell mouth 20 may be integrally formed with the front panel of the housing 10 due to plastic deformation of the sheet metal such as press working, and a die is used for the press working.
- the bell mouth 20 is formed by holding the front panel of the housing 10 in the lower die of the die and bending the sheet metal in the direction of the lower die of the die by bending or the like.
- the second tapered portion 25 is formed at a position close to the front panel, and the first tapered portion 23 is formed at a position away from the front panel. If the second opening diameter D2 of the downstream end 25a of the second tapered portion 25 is formed to be larger than the first opening diameter D1 of the upstream end 23a1 of the first tapered portion 23, the mold is formed.
- the front panel of the housing 10 When the front panel of the housing 10 is removed from the lower mold, it is possible to prevent the upstream end portion 23a1 of the first tapered portion 23 from interfering with the lower mold of the mold. Therefore, if the second opening diameter D2 of the downstream end 25a of the second tapered portion 25 is formed to be larger than the first opening diameter D1 of the upstream end 23a1 of the first tapered portion 23, The manufacturing efficiency of the bell mouth 20 can be improved.
- the inner surface of the second tapered portion 25 has a shape bulging toward the inside of the bell mouth 20, but is not limited to this.
- the inner surface of the second tapered portion 25 may be linear, or may be a combination of an inner surface having a shape bulging toward the inside of the bell mouth 20 and a straight inner surface.
- the second tapered portion 25 can be omitted depending on the shape or size of the outdoor unit 100. That is, the end portion 21b of the straight pipe portion 21 may be directly connected to the opening 10a of the housing 10.
- the first tapered portion 23 is a reduced portion whose inner diameter decreases from upstream to downstream in the mainstream direction of the air flow.
- the first tapered portion 23 has a length H1 of at least a part of the first tapered portion 23 along the direction of the axis AX longer than the length H2 of the straight pipe portion 21 along the direction of the axis AX. It is formed.
- the length H1 of the first tapered portion 23 is larger than the length H2 of the straight pipe portion 21 along the direction of the axis AX in the entire circumference of the first tapered portion 23 in the circumferential direction. It may be formed to be long.
- the fact that the length H1 of at least a part of the first tapered portion 23 is longer than the length H2 of the straight pipe portion 21 means that the distance of the flow path of the first tapered portion 23 in the mainstream direction of air is the mainstream of air. It means that it is larger than the distance of the flow path of the straight pipe portion 21 in the direction. Therefore, by making the length H1 of the first tapered portion 23 longer than the length H2 of the straight pipe portion 21, the contraction of the air flow in the first tapered portion 23 which is the reduced portion can be smoothed, so that the straight pipe can be smoothed. The generation of vortices due to contraction in the section 21 can be suppressed.
- the separation of the air flow from the inner surface of the straight pipe portion 21 becomes larger toward the downstream in the mainstream direction of the air. Therefore, when the distance of the flow path of the straight pipe portion 21 is large, the vortex generated on the upstream side of the straight pipe portion 21 may become large. Due to the generation of the vortex in the straight pipe portion 21, the air flow path in the straight pipe portion 21 is substantially narrowed.
- the length H2 of the straight pipe portion 21 is shorter than the length H1 of the first tapered portion 23, it is possible to suppress an increase in the vortex generated in the straight pipe portion 21. Therefore, according to the above configuration, it is possible to provide the outdoor unit 100 of the air conditioner capable of suppressing the pressure loss in the bell mouth 20.
- the inflow of sidestream air causes the air flow to separate from the straight pipe portion 21, and a vortex is generated on the upstream side of the straight pipe portion 21.
- the angle between the flow direction of the sidestream air and the mainstream direction of the air increases, it becomes difficult to divert the flow of the sidestream air toward the mainstream direction of the air, and the vortex generated in the straight pipe portion 21 is generated. growing.
- the length H1 of at least a part of the first tapered portion 23 is made longer than the length H2 of the straight pipe portion 21, the flow of the sidestream air in the first tapered portion 23 is directed in the mainstream direction of the air. It is possible to secure the air passage distance for this. Therefore, it is possible to suppress the generation of a vortex due to the separation of the air flow at the end portion 21a of the straight pipe portion 21. Further, since the ratio of the length H2 of the straight pipe portion 21 to the length H1 of the first tapered portion 23 becomes small, it is possible to suppress an increase in the vortex generated in the straight pipe portion 21.
- the length H1 of the first tapered portion 23 longer than the length H2 of the straight pipe portion 21, it is possible to suppress the vortex due to the separation of the air flow in the straight pipe portion 21. Therefore, according to the configuration, it is possible to provide the outdoor unit 100 of the air conditioner capable of suppressing the pressure loss in the bell mouth 20.
- the length H1 of at least a part of the first tapered portion 23 is made longer than the length H2 of the straight pipe portion 21, the flow of the sidestream air in the first tapered portion 23 is directed in the mainstream direction of the air. Therefore, the load on the leading edge of the blade 3a of the axial flow fan 3 can be reduced. Therefore, it is possible to design a low power input of the axial fan 3, and it is possible to save power of the outdoor unit 100 of the air conditioner.
- the first tapered portion 23 connects the first bent portion 23a forming the air inlet 20a of the bell mouth 20 and the second bent portion 23b which is connected to the straight pipe portion 21 and has an inner diameter smaller than that of the first bent portion 23a.
- the first bent portion 23a and the second bent portion 23b are located at both ends of the first tapered portion 23 in the direction of the axis AX, and the first bent portion 23a is the second bent portion 23a in the mainstream direction of the air flow. It is located on the upstream side of the portion 23b.
- the end portion 23a1 of the first bent portion 23a located on the upstream side in the mainstream direction of the air flow forms the air inlet 20a.
- the end portion 23b1 of the second bent portion 23b located on the downstream side in the mainstream direction of the air flow is connected to the end portion 21a of the straight pipe portion 21.
- the shapes or sizes of the first bent portion 23a and the second bent portion 23b can be adjusted separately to adjust the shape or size of the bell mouth 20. It is possible to perform an optimized design of shape or size. For example, in the first bent portion 23a, the air flow of the side flow flows into the first tapered portion 23 along the inner surface of the first bent portion 23a, and in the second bent portion 23b, the air flow of the side flow is directed in the main flow direction of the air. It is possible to convert to.
- first tapered portion 23 can be formed so as to have a connecting portion 23c connected to the first bent portion 23a and the second bent portion 23b.
- the connecting portion 23c has an end portion 23c1 located on the upstream side and an end portion 23c2 located on the downstream side in the mainstream direction of the air flow.
- the end portion 23c1 of the connecting portion 23c is connected to the end portion 23a2 on the downstream side of the first bent portion 23a in the mainstream direction of the air flow.
- the end portion 23c2 of the connecting portion 23c is connected to the end portion 23b2 on the upstream side of the second bent portion 23b in the mainstream direction of the air flow.
- the inner diameter of the connecting portion 23c is reduced from the end portion 23c1 toward the end portion 23c2.
- the connecting portion 23c in the first tapered portion 23 By providing the connecting portion 23c in the first tapered portion 23, the flow of the sidestream air flowing into the first tapered portion 23 along the inner surface of the first bent portion 23a can be flowed along the inner surface of the connecting portion 23c. It can flow into the second bent portion 23b. Therefore, by providing the connecting portion 23c in the first tapered portion 23, it is possible to suppress the separation of the air flow in the first tapered portion 23.
- the connecting portion 23c can be omitted depending on the shape and size of the outdoor unit 100. That is, the first tapered portion 23 can be configured such that the downstream end portion 23a2 of the first bent portion 23a is directly connected to the end portion 23b2 of the second bent portion 23b.
- the inner surface of the first bent portion 23a extending from the upstream side to the downstream side where air flows in has a shape bulging toward the inside of the bell mouth 20, that is, the radial inside of the bell mouth 20. It can be curved in a curved shape toward.
- the inner surface of the second bent portion 23b in the direction of the axis AX has a shape that bulges toward the inside of the bell mouth 20, that is, a shape that bends in a curved shape toward the inside of the bell mouth 20 in the radial direction.
- an example of the inner surface shape of the connecting portion 23c is a linear shape as shown in FIG.
- a part or all of the first bent portion 23a has a shape bulging toward the outside of the bell mouth 20, that is, a curve toward the outside in the radial direction of the bell mouth 20, depending on the internal structure of the outdoor unit 100 and the like.
- the shape can be bent into a shape.
- the opening diameter of the inflow port 20a of the bell mouth 20 is compared with the case where the first bent portion 23a is bent in the radial direction. Since it becomes easy to suppress the spread of the bell mouth 20, the bell mouth 20 can be miniaturized.
- the first bent portion 23a can be bent in a curved shape toward the radial outer side of the bell mouth 20.
- the inner surface of the bell mouth 20 on the inflow port side is extended along the surface of the partition plate 15 of FIG. 1, and the partition is formed. The air flowing along the plate 15 can be smoothly flowed into the bell mouth 20.
- the line forming the inner surface of the first bent portion 23a will be referred to as the first ridge line 23a3.
- the first ridge line 23a3 extends from the upstream side of the first bent portion 23a into which air flows to the downstream side of the first bent portion 23a.
- the line forming the inner surface of the second bent portion 23b is referred to as a second ridge line 23b3.
- the second ridge line 23b3 is arranged on an extension line of the first ridge line 23a3.
- the line forming the inner surface of the connecting portion 23c and connecting between the first ridge line 23a3 and the second ridge line 23b3 is referred to as the third ridge line 23c3.
- FIG. 3 is a schematic diagram showing the relationship between the first radius of curvature R1 and the first central angle ⁇ 1 on the first ridge line 23a3 according to the embodiment.
- the center of curvature of the first ridge 23a3 is indicated by a point O
- one end 23a1 of the first bent portion 23a is indicated by a point P1
- the other end 23a2 of the first bent portion 23a is indicated by a point P2.
- the lengths of the line segment OP1 and the line segment OP2 are the same, and can be determined as the first radius of curvature R1 of the first ridge line 23a3.
- the first central angle ⁇ 1 can be determined as an angle between the line segment OP1 and the line segment OP2 centered on the point O.
- the shape and size of the first tapered portion 23 are the first radius of curvature R1 of the first ridge line 23a3, the first central angle ⁇ 1 of the first ridge line 23a3, the second radius of curvature R2 of the second ridge line 23b3, and the second ridge line 23b3. It can be determined based on the second central angle ⁇ 2 of.
- the bent shape of the first ridge line 23a3 becomes gentle because the bent shape of the first ridge line 23a3 approaches a straight line as the first radius of curvature R1 increases.
- the length of the first ridge line 23a3 becomes smaller as the first central angle ⁇ 1 becomes smaller, so that the first bent portion 23a can be miniaturized. It will be possible.
- FIG. 4 is a schematic view showing the relationship between the first radius of curvature R1 and the second radius of curvature R2 in the first tapered portion 23 according to the embodiment.
- the magnitudes of the first radius of curvature R1 of the first ridge line 23a3 and the second radius of curvature R2 of the second ridge line 23b3 are indicated by arrows.
- the bending shape of the second ridge line 23b3 becomes gentle because the bending shape of the second ridge line 23b3 approaches a straight line as the second radius of curvature R2 increases. Further, in the second ridge line 23b3, when the second radius of curvature R2 is constant, the length of the second ridge line 23b3 becomes smaller as the second central angle ⁇ 2 becomes smaller, so that the second bent portion 23b can be miniaturized. It will be possible.
- the shape and size of the first tapered portion 23 can be determined based on the length L of the third ridge line 23c3. As the length L becomes smaller, the width of the connecting portion 23c in the direction of the shaft 3c of the axial flow fan 3 becomes smaller, so that the connecting portion 23c can be miniaturized.
- the first tapered portion 23 can be formed so that the first radius of curvature R1 of the first ridge line 23a3 is larger than the second radius of curvature R2 of the second ridge line 23b3. That is, in the first tapered portion 23, the curvature of the first bent portion 23a formed by the first ridge line 23a3 can be made smaller than the curvature of the second bent portion 23b formed by the second ridge line 23b3.
- the curvature is the reciprocal of the radius of curvature.
- the first central angle ⁇ 1 of the first ridgeline 23a3 is large, and even when the sidestream air is greatly deflected, the first ridgeline 23a3 is formed. Air can be circulated along. Further, the air that has passed through the first tapered portion 23 flows along the second ridge line 23b3 of the second bent portion 23b, and the air can flow in the direction of the shaft 3c of the axial flow fan 3. That is, by having the first tapered portion 23, the bell mouth 20 guides the sidestream air to the axial fan 3 without separating it, and causes the air to flow into the straight pipe portion 21 in the same direction as the mainstream direction of the air. be able to.
- the outdoor unit 100 usually has an axial fan 3 that generates an air flow.
- the size of the outdoor unit 100 can be reduced by arranging the blades 3a of the axial flow fan 3 inside the straight pipe portion 21.
- the ventilation performance of the axial fan 3 deteriorates, so that the power consumption of the axial fan 3 is increased in order to compensate for the deterioration of the ventilation performance. I needed to let you.
- the first tapered portion 23 can be formed so as to have a connecting portion 23c connected to the first bent portion 23a and the second bent portion 23b.
- the connecting portion 23c in the first tapered portion 23
- the air flow flowing along the first ridge line 23a3 of the first bent portion 23a is separated at the boundary between the first bent portion 23a and the second bent portion 23b. It can be suppressed.
- the connecting portion 23c is configured to have a third ridge line 23c3 extending linearly between the first bent portion 23a and the second bent portion 23b, the above-mentioned air flow is directed along the third ridge line 23c3. Since it can be guided smoothly, it is possible to further suppress the separation of the air flow at the first tapered portion 23.
- the distribution of the air flow flowing into the straight pipe portion 21 can be made more uniform, and the bell mouth The miniaturization of 20 can be realized more flexibly.
- the shape and size of the first tapered portion 23 can be determined based on the length L of the third ridge line 23c3. Therefore, the shape and size of the first tapered portion 23 can be flexibly designed by changing the length L of the third ridge line 23c3 in the circumferential direction of the first tapered portion 23. For example, by shortening the length L of the third ridge line 23c3 while maintaining the shapes and sizes of the first bent portion 23a and the second bent portion 23b in the circumferential direction, the air flow in the first tapered portion 23. The width of the first tapered portion 23 in the radial direction can be reduced while suppressing the peeling of the first tapered portion 23.
- the bell mouth 20 provided around the axial fan 3 such as the propeller fan used in the outdoor unit 100 of the air conditioner may be installed in a narrow space due to the influence of the miniaturization of the outdoor unit 100.
- the ventilation performance is deteriorated even in a narrow space. It is possible to suppress the bell mouth 20 and reduce the size of the bell mouth 20.
- the shape and size of the first tapered portion 23 can be determined based on the length H1 of the first tapered portion 23 along the direction of the axis AX. By changing the length H1 in the circumferential direction of the first tapered portion 23, the shape and size of the first tapered portion 23 can be flexibly designed.
- the shape and size of the first tapered portion 23 are the first radius of curvature R1 of the first ridge line 23a3, the first central angle ⁇ 1 of the first ridge line 23a3, the second radius of curvature R2 of the second ridge line 23b3, and the second. It can be determined based on at least one of the second central angles ⁇ 2 of the ridge line 23b3. By changing at least one of the first radius of curvature R1, the first central angle ⁇ 1, the second radius of curvature R2, and the second central angle ⁇ 2 in the circumferential direction of the first tapered portion 23, the first tapered portion The shape and size of the 23 can be flexibly designed.
- An example of an embodiment in which the shape of the first tapered portion 23 is changed in the circumferential direction with respect to the shaft AX is an example of an outdoor unit 100 having an L-shaped heat exchanger 1 in a top view as shown in FIG. It is explained as.
- the following description is merely an example of the embodiment, and is not intended to limit the content of the present disclosure by this embodiment.
- the heat exchanger 1 has a first portion 1a arranged on the rear surface side of the housing 10 and a second portion 1b arranged on the left surface side of the housing 10.
- the first portion 1a extends in a direction intersecting the direction of the shaft 3c of the axial flow fan 3 on the rear surface side of the housing 10.
- the second portion 1b extends in a direction intersecting with the first portion 1a and is arranged at a distance from the first tapered portion 23.
- a partition plate 15 is installed inside the housing 10.
- FIG. 5 is an enlarged schematic view showing a first cross section 20b and a second cross section 20c of the bell mouth 20 of FIG. 1.
- the second portion 1b is arranged on the extension line of the first ridge line 23a3 forming the inner surface of the first bent portion 23a.
- the second portion 1b is not arranged on the extension line of the first ridge line 23a3 forming the inner surface of the first bent portion 23a.
- the inner surface of the first bent portion 23a is composed of a first upstream side region 33a1 and a second upstream side region 33a2.
- the first upstream side region 33a1 and the second upstream side region 33a2 are formed by the first ridge line 23a3.
- the second portion 1b is arranged on the extension line of the first ridge line 23a3 forming the first upstream side region 33a1. That is, the inner surface of the first bent portion 23a shown in the first cross section 20b of FIG. 5 is an example of the first upstream side region 33a1. Further, the second portion 1b is not arranged on the extension line of the first ridge line 23a3 forming the second upstream side region 33a2.
- the inner surface of the first bent portion 23a shown in the second cross section 20c of FIG. 5 is an example of the second upstream side region 33a2.
- the shape of the first ridge line 23a3 forming the first upstream side region 33a1 is a shape bulging toward the inside of the bell mouth 20.
- the first ridge line 23a3 forming the second upstream region 33a2 bulges toward the inside of the bell mouth, but is not limited to this shape.
- the first ridge line 23a3 forming the second upstream region 33a2 may have a shape bulging toward the outside of the bell mouth 20.
- the inner surface of the second bent portion 23b is composed of a first downstream side region 33b1 and a second downstream side region 33b2.
- the first downstream side region 33b1 and the second downstream side region 33b2 are formed by the second ridge line 23b3.
- the second ridge line 23b3 forming the first downstream side region 33b1 is arranged on an extension line of the first ridge line 23a3 of the first upstream side region 33a1. That is, the inner surface of the second bent portion 23b shown in the first cross section 20b of FIG. 5 is an example of the first downstream side region 33b1.
- the second ridge line 23b3 forming the second downstream side region 33b2 is arranged on an extension line of the first ridge line 23a3 of the second upstream side region 33a2.
- the inner surface of the second bent portion 23b shown in the second cross section 20c of FIG. 5 is an example of the second downstream side region 33b2. Further, the first downstream side region 33b1 and the second downstream side region 33b2 have a shape bulging toward the inside of the bell mouth 20.
- the inner surface of the connecting portion 23c is composed of a first intermediate region 33c1 and a second intermediate region 33c2.
- the first intermediate region 33c1 and the second intermediate region 33c2 are formed by the third ridge line 23c3.
- the third ridge line 23c3 forming the first intermediate region 33c1 is connected between the first ridge line 23a3 forming the first upstream side region 33a1 and the second ridge line 23b3 forming the first downstream side region 33b1. That is, the inner surface of the connecting portion 23c shown in the first cross section 20b of FIG. 5 is an example of the first intermediate region 33c1.
- the third ridge line 23c3 forming the second intermediate region 33c2 is connected between the first ridge line 23a3 forming the second upstream side region 33a2 and the second ridge line 23b3 forming the second downstream side region 33b2.
- the inner surface of the connecting portion 23c shown in the second cross section 20c of FIG. 5 is an example of the second intermediate region 33c2.
- the third ridge line 23c3 is formed, for example, in a straight line.
- the first central angle ⁇ 1a of the first ridge line 23a3 forming the first upstream side region 33a1 is different from the first central angle ⁇ 1b of the first ridge line 23a3 forming the second upstream side region 33a2.
- the first central angle ⁇ 1a of the first ridge line 23a3 forming the first upstream side region 33a1 can be formed smaller than the first central angle ⁇ 1b of the first ridge line 23a3 forming the second upstream side region 33a2.
- the sidestream air flows in from a direction different from the mainstream direction of the air due to the rotation of the axial fan 3.
- the first ridge line 23a3 forming the first upstream side region 33a1 becomes shorter.
- the first radius of curvature R1 of the first ridge line 23a3 is kept constant, sidestream air can flow along the first ridge line 23a3 forming the first upstream side region 33a1, so that the first tapered portion 23 It is possible to reduce the separation of air in.
- the first taper The radial width of the portion 23 can be reduced. Therefore, according to this configuration, even when the gap between the bell mouth 20 and the heat exchanger 1 is narrow, it is possible to suppress the deterioration of the ventilation performance and to reduce the size of the bell mouth 20.
- the first central angle ⁇ 1a of the first ridge line 23a3 forming the first upstream region 33a1 may be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied.
- the first bent portion 23a can be formed so that the first central angle ⁇ 1a of the first ridge line 23a3 is minimized in the first cross section 20b where the distance between the second portion 1b and the first bent portion 23a is minimized. ..
- the first central angle ⁇ 1b of the first ridge line 23a3 forming the second upstream side region 33a2 may also be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied.
- the first radius of curvature R1 of the first ridge line 23a3 can be changed in the circumferential direction of the first tapered portion 23.
- the second central angle ⁇ 2a of the second ridge line 23b3 forming the first downstream side region 33b1 is the second central angle ⁇ 2b of the second ridge line 23b3 forming the second downstream side region 33b2.
- the second central angle ⁇ 2a of the second ridge line 23b3 forming the first downstream side region 33b1 can be formed larger than the second central angle ⁇ 2b of the second ridge line 23b3 forming the second downstream side region 33b2.
- Air that has passed through the second portion 1b and has flowed in along the first ridge line 23a3 of the first upstream side region 33a1 and is different from the mainstream direction of the air is along the second ridge line 23b3 forming the first downstream side region 33b1.
- the second central angle ⁇ 2a of the second ridge line 23b3 forming the first downstream side region 33b1 is increased, the second ridge line 23b3 forming the first downstream side region 33b1 can be lengthened. If the second ridge line 23b3 forming the first downstream side region 33b1 is lengthened, the air flowing along the second ridge line 23b3 of the first downstream side region 33b1 can be surely brought closer to the direction of the shaft 3c of the axial flow fan 3. Can be done. Therefore, by increasing the second central angle ⁇ 2a of the second ridge line 23b3 forming the first downstream side region 33b1, the distribution of the air flow inside the straight pipe portion 21 can be made more uniform.
- the first tapered portion 23 can be miniaturized, so that the outdoor unit 100 can be miniaturized.
- the second central angle ⁇ 2a of the second ridge line 23b3 forming the first downstream side region 33b1 may be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied.
- the second bent portion 23b can be formed so that the second central angle ⁇ 2a of the second ridge line 23b3 is maximized in the first cross section 20b where the distance between the second portion 1b and the second bent portion 23b is the minimum. ..
- the second central angle ⁇ 2b of the second ridge line 23b3 forming the second downstream side region 33b2 may also be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied.
- the second radius of curvature R2 of the second ridge line 23b3 can be changed in the circumferential direction of the first tapered portion 23.
- the length L1 of the third ridge line 23c3 forming the first intermediate region 33c1 can be made different from the length L2 of the third ridge line 23c3 of the second intermediate region 33c2.
- the length L1 of the third ridge line 23c3 forming the first intermediate region 33c1 can be formed to be shorter than the length L2 of the third ridge line 23c3 forming the second intermediate region 33c2.
- the first tapered portion 23 can be miniaturized by making the length L1 of the third ridge line 23c3 forming the first intermediate region 33c1 shorter than the length L2 forming the third ridge line 23c3 of the second intermediate region 33c2. Therefore, the outdoor unit 100 can be downsized.
- the space between the second portion 1b of the heat exchanger 1 and the axial flow fan 3 is narrowed by shortening the length L1 of the third ridge line 23c3 of the first intermediate region 33c1. be able to.
- the first tapered portion The radial width of 23 can be reduced. Therefore, even when the gap between the heat exchanger 1 and the bell mouth 20 is narrow, it is possible to suppress the deterioration of the ventilation performance and to reduce the size of the bell mouth 20.
- the length H1a of the first upstream side region 33a1 of the first tapered portion 23 along the direction of the axis AX is the length H1b of the second upstream side region 33a2 of the first tapered portion 23 along the direction of the axis AX.
- the length H1a to a value different from the length H1b, the dimensions of the bell mouth 20 in the mainstream direction of air can be flexibly designed even when the gap between the heat exchanger 1 and the bell mouth 20 is narrow. Therefore, the bell mouth 20 can be miniaturized.
- the above-described embodiment can be modified in various ways without departing from the gist of the present disclosure.
- the outdoor unit 100 is a chiller unit
- the above-described embodiment can be similarly applied, and even if the air conditioner integrates the outdoor unit 100 and the indoor unit, the above-described embodiment is carried out.
- the morphology is applicable as well.
- 1 heat exchanger 1a 1st part, 1b 2nd part, 3 axial flow fan, 3a wing, 3b hub, 3c axis, 3d motor, 5 compressor, 10 housing, 10a opening, 10b grill, 15 partition plate, 15a blower room, 15b machine room, 20 bell mouth, 20a inlet, 20b first cross section, 20c second cross section, 21 straight pipe part, 21a end, 21b end, 23 first taper part, 23a first bend part.
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An outdoor unit of an air conditioning device is provided with a bell mouth having a first tapered part in which the inside diameter on the upstream side with respect to the inflow of air is greater than the inside diameter on the downstream side, and a straight tube part extending downstream in a straight line from the first tapered part. The first tapered part has a first bend part forming an air inflow port, a second bend part that is continuous with the straight tube part and that has a smaller inside diameter than that of the first bend part, and a linking part continuous with the first bend part and the second bend part, the inner surface of the linking part extending in a straight line. The length of at least a part of the first tapered part along the direction of the axis of the straight line part is greater than the length of the straight tube part along the direction of the axis.
Description
本開示は、ベルマウスを備えた空気調和装置の室外機に関する。
This disclosure relates to an outdoor unit of an air conditioner equipped with a bell mouth.
特許文献1には、ベルマウスを備えた空気調和装置の室外機が開示されている。ベルマウスは、空気の主流の上流側に設けられ、屈曲面で形成され、空気の主流の上流側から下流側に向けて管径が狭くなる縮小部と、縮小部の下流に連なる直管部とを有している。特許文献1では、縮小部の曲率半径を周方向に変化させ、ベルマウスが熱交換器と干渉するのを抑制している。
Patent Document 1 discloses an outdoor unit of an air conditioner equipped with a bell mouth. The bell mouth is provided on the upstream side of the mainstream of air, is formed by a bent surface, and has a reduced pipe diameter that narrows from the upstream side to the downstream side of the mainstream air, and a straight pipe portion connected to the downstream of the reduced portion. And have. In Patent Document 1, the radius of curvature of the reduced portion is changed in the circumferential direction to prevent the bell mouth from interfering with the heat exchanger.
ベルマウスでは、空気の流れが縮小部で収縮されることにより、直管部で縮流が生じるため、直管部の内面に渦が生じる場合がある。また、特許文献1のベルマウスには、縮小部の曲率半径を周方向に変化させることにより、空気の主流方向に沿った縮小部の長さが空気の主流方向に沿った直管部の長さよりも小さくなる箇所が生じる。空気の主流方向の長さが小さい箇所においては、空気の主流方向と異なる方向からの空気が縮小部の屈曲面に流入すると、空気の主流方向と異なる方向から流入する空気を、空気の主流方向に転向するための転向角度が大きくなる。転向角度が大きくなると、空気の主流方向と異なる方向からの空気の流れを空気の主流方向に転向できなくなるため、直管部において空気の剥離が生じ、空気の剥離による渦が発生する。直管部で発生した渦は、直管部が長くなるにつれて大きくなり、渦の存在により、直管部における空気の流路が実質的に狭められる。したがって、特許文献1のベルマウスにおいては、直管部における空気の流路が実質的に狭められることにより、直管部に圧力損失が生じる可能性がある。
In bell mouths, the air flow is contracted at the contracted portion, which causes contraction at the straight pipe portion, which may cause a vortex on the inner surface of the straight pipe portion. Further, in the bell mouth of Patent Document 1, by changing the radius of curvature of the reduced portion in the circumferential direction, the length of the reduced portion along the mainstream direction of air is the length of the straight pipe portion along the mainstream direction of air. There will be places that are smaller than the air. In places where the length of the air in the mainstream direction is small, when air from a direction different from the mainstream direction of air flows into the bent surface of the shrinking portion, the air flowing in from a direction different from the mainstream direction of air is directed to the mainstream direction of air. The turning angle for turning to is increased. When the turning angle becomes large, the air flow from a direction different from the mainstream direction of the air cannot be turned to the mainstream direction of the air, so that the air is separated in the straight pipe portion and a vortex due to the separation of the air is generated. The vortex generated in the straight pipe portion becomes larger as the straight pipe portion becomes longer, and the presence of the vortex substantially narrows the air flow path in the straight pipe portion. Therefore, in the bell mouth of Patent Document 1, pressure loss may occur in the straight pipe portion due to the substantially narrowing of the air flow path in the straight pipe portion.
本開示は、上述の課題を解決するものであり、ベルマウスにおける圧力損失の発生を抑制可能な空気調和装置の室外機を提供することを目的とする。
The present disclosure is to solve the above-mentioned problems, and an object of the present disclosure is to provide an outdoor unit of an air conditioner capable of suppressing the occurrence of pressure loss in a bell mouth.
本開示の空気調和装置の室外機は、熱交換器と、前記熱交換器に誘引される空気の流れを生成する軸流ファンと、前記空気が通過する開口を有し、前記熱交換器を収容し、前記開口と前記熱交換器との間に前記軸流ファンを収容する筐体と、前記筐体の内部において、前記軸流ファンの周囲に設けられ、前記空気を前記開口に誘導する環状のベルマウスとを備え、前記ベルマウスは、前記空気が流入する上流側の内径が、下流側の内径より大きい第1テーパ部と、前記第1テーパ部から下流側に直線状に延びる直管部とを有しており、前記第1テーパ部は、前記空気の流入口を形成する第1屈曲部と、前記直管部と連なり、前記第1屈曲部よりも内径が小さい第2屈曲部と、前記第1屈曲部と前記第2屈曲部とに連なり、内面が直線状に延びた連結部とを有しており、前記直管部の軸の方向に沿った少なくとも一部の前記第1テーパ部の長さは、前記軸の方向に沿った前記直管部の長さよりも長い。
The outdoor unit of the air conditioner of the present disclosure has a heat exchanger, an axial flow fan that generates an air flow attracted to the heat exchanger, and an opening through which the air passes, and the heat exchanger is provided. A housing for accommodating and accommodating the axial flow fan between the opening and the heat exchanger, and inside the housing, provided around the axial flow fan to guide the air to the opening. The bell mouth is provided with an annular bell mouth, and the bell mouth has a first tapered portion in which the inner diameter on the upstream side into which the air flows is larger than the inner diameter on the downstream side, and a straight line extending from the first tapered portion to the downstream side. The first tapered portion has a pipe portion, and the first tapered portion is connected to the first bent portion forming the air inlet and the straight pipe portion, and has a second bent portion having an inner diameter smaller than that of the first bent portion. It has a portion, a connecting portion connected to the first bent portion and the second bent portion, and an inner surface extending linearly, and at least a part of the said portion along the direction of the axis of the straight pipe portion. The length of the first tapered portion is longer than the length of the straight pipe portion along the direction of the axis.
上述の構成では、第1テーパ部は、内面が直線状に延びた連結部を有しており、直管部の軸の方向に沿った少なくとも一部の第1テーパ部の長さは、直管部の軸の方向に沿った直管部の長さよりも長くなる。すなわち、縮小部である第1テーパ部は、直線状の内面を有しており、空気の主流方向における第1テーパ部の流路の距離は、空気の主流方向における直管部の流路の距離より大きくなる。したがって、当該構成によれば、第1テーパ部における空気の流れの収縮を滑らかにするとともに、空気の主流方向と異なる方向の空気が第1テーパ部に流入した場合であっても、第1テーパ部において空気の主流方向に滑らかに転向できる。したがって、本開示の構成によれば、直管部における渦の発生により、直管部において空気の流路が実質的に狭められるのを抑制できるため、ベルマウスにおける圧力損失を抑制可能な空気調和装置の室外機を提供できる。
In the above configuration, the first tapered portion has a connecting portion whose inner surface extends linearly, and the length of at least a part of the first tapered portion along the direction of the axis of the straight pipe portion is straight. It is longer than the length of the straight pipe portion along the direction of the pipe portion axis. That is, the first tapered portion, which is a reduced portion, has a linear inner surface, and the distance of the flow path of the first tapered portion in the mainstream direction of air is the flow path of the straight pipe portion in the mainstream direction of air. Greater than the distance. Therefore, according to the configuration, the contraction of the air flow in the first taper portion is smoothed, and even when air in a direction different from the mainstream direction of air flows into the first taper portion, the first taper portion is used. The part can be smoothly turned in the mainstream direction of air. Therefore, according to the configuration of the present disclosure, it is possible to suppress the substantially narrowing of the air flow path in the straight pipe portion due to the generation of the vortex in the straight pipe portion, so that the air conditioning capable of suppressing the pressure loss in the bell mouth is possible. The outdoor unit of the device can be provided.
実施の形態.
実施の形態に係る空気調和装置の室外機100の構造について説明する。図1は、実施の形態に係る空気調和装置の室外機100の内部構造の一例を概略的に示した上面図である。図1では、室外機100の駆動時における主流の空気の流入方向が白抜きのブロック矢印で示されており、主流の空気の流入方向と異なる方向から流れる空気の流入方向が、ドットパターンのブロック矢印で示されている。 Embodiment.
The structure of theoutdoor unit 100 of the air conditioner according to the embodiment will be described. FIG. 1 is a top view schematically showing an example of the internal structure of the outdoor unit 100 of the air conditioner according to the embodiment. In FIG. 1, the inflow direction of mainstream air when the outdoor unit 100 is driven is indicated by a white block arrow, and the inflow direction of air flowing from a direction different from the inflow direction of mainstream air is a dot pattern block. It is indicated by an arrow.
実施の形態に係る空気調和装置の室外機100の構造について説明する。図1は、実施の形態に係る空気調和装置の室外機100の内部構造の一例を概略的に示した上面図である。図1では、室外機100の駆動時における主流の空気の流入方向が白抜きのブロック矢印で示されており、主流の空気の流入方向と異なる方向から流れる空気の流入方向が、ドットパターンのブロック矢印で示されている。 Embodiment.
The structure of the
なお、図1を含む以下の図面においては、室外機100の各構成部材の寸法の関係及び形状は、実際のものとは異なる場合がある。また、室外機100の各構成部材同士の位置関係、例えば、上下、左右、前後等の位置関係は、原則として、室外機100を使用可能な状態に設置したときの位置関係とする。また、図1を含む以下の図面では、同一の部材若しくは部分又は類似する部材若しくは部分には、同一の符号を付すか、又は符号を付すことを省略している。
In the following drawings including FIG. 1, the dimensional relationship and shape of each component of the outdoor unit 100 may differ from the actual one. Further, the positional relationship between the constituent members of the outdoor unit 100, for example, the positional relationship such as up / down, left / right, front / back, etc., is, in principle, the positional relationship when the outdoor unit 100 is installed in a usable state. Further, in the following drawings including FIG. 1, the same members or parts or similar members or parts are designated by the same reference numerals or omitted.
室外機100は、熱交換器1、軸流ファン3、及び圧縮機5を収容する筐体10を有している。筐体10は、例えば、複数の板金パネル等を組み合わせることにより形成される。筐体10には、筐体10の内部と連通する開口10aが設けられている。図1に示すように、開口10aは、例えば、筐体10の前面に配置されている。また、筐体10には、開口10aを覆うグリル10bが配置されている。
The outdoor unit 100 has a housing 10 that houses a heat exchanger 1, an axial fan 3, and a compressor 5. The housing 10 is formed, for example, by combining a plurality of sheet metal panels and the like. The housing 10 is provided with an opening 10a that communicates with the inside of the housing 10. As shown in FIG. 1, the opening 10a is arranged, for example, on the front surface of the housing 10. Further, a grill 10b that covers the opening 10a is arranged in the housing 10.
熱交換器1は、熱交換器1を通過する空気流と、熱交換器1の内部を流通する冷媒との間で熱交換を行うものである。熱交換器1としては、例えば、並列に配置された複数の板状フィンと、複数の板状フィンを貫通する複数の伝熱管とを備えるフィンアンドチューブ型熱交換器等の空冷式の熱交換器1が用いられる。図1では、熱交換器1は、筐体10の後面側に配置された第1部分1aと、筐体10の左面側に配置された第2部分1bとを有する、上面視においてL字形状の熱交換器1として形成されている。なお、L字形状の熱交換器1は、あくまでも熱交換器1の一例であり、熱交換器1は他の形状とすることもできる。
The heat exchanger 1 exchanges heat between the air flow passing through the heat exchanger 1 and the refrigerant flowing inside the heat exchanger 1. The heat exchanger 1 includes, for example, an air-cooled heat exchange such as a fin-and-tube heat exchanger including a plurality of plate-shaped fins arranged in parallel and a plurality of heat transfer tubes penetrating the plurality of plate-shaped fins. Vessel 1 is used. In FIG. 1, the heat exchanger 1 has an L-shape in a top view, having a first portion 1a arranged on the rear surface side of the housing 10 and a second portion 1b arranged on the left surface side of the housing 10. It is formed as a heat exchanger 1 of. The L-shaped heat exchanger 1 is merely an example of the heat exchanger 1, and the heat exchanger 1 may have another shape.
軸流ファン3は、熱交換器1と筐体10に設けられた開口10aとの間に配置されている。軸流ファン3としては、例えば、プロペラファン等が用いられる。軸流ファン3は、空気の流れを回転により生成する複数の翼3aと、複数の翼3aを支持して回転させるハブ3bと、先端がハブ3bに連結された軸3cと、軸3cの末端に連結され、軸3cを回転させるモータ3dとを有している。軸流ファン3の軸3cの先端は、開口10aの方向に向くように配置されている。モータ3dは、例えば、電圧によって軸3cの回転数を制御可能な三相誘導モータ又はDCブラシレスモータが用いられる。
The axial flow fan 3 is arranged between the heat exchanger 1 and the opening 10a provided in the housing 10. As the axial flow fan 3, for example, a propeller fan or the like is used. The axial flow fan 3 includes a plurality of blades 3a that generate an air flow by rotation, a hub 3b that supports and rotates the plurality of blades 3a, a shaft 3c whose tip is connected to the hub 3b, and a terminal of the shaft 3c. It has a motor 3d which is connected to and rotates the shaft 3c. The tip of the shaft 3c of the axial flow fan 3 is arranged so as to face the direction of the opening 10a. As the motor 3d, for example, a three-phase induction motor or a DC brushless motor in which the rotation speed of the shaft 3c can be controlled by a voltage is used.
圧縮機5は、吸入した低圧冷媒を圧縮し、高圧冷媒として吐出するものである。圧縮機5としては、例えば、ロータリ圧縮機又はスクロール圧縮機が用いられる。図示しないが、圧縮機5は、冷媒配管により、熱交換器1と接続されている。
The compressor 5 compresses the sucked low-pressure refrigerant and discharges it as a high-pressure refrigerant. As the compressor 5, for example, a rotary compressor or a scroll compressor is used. Although not shown, the compressor 5 is connected to the heat exchanger 1 by a refrigerant pipe.
また、筐体10の内部には、仕切板15が設置されている。筐体10の内部は、仕切板15によって、送風機室15aと機械室15bとに区画されている。送風機室15aには、熱交換器1及び軸流ファン3が配置され、機械室15bには圧縮機5が配置されている。なお、図1では、仕切板15は、単一の直線状の断面を有する板状部材として形成されているが、他の形状の断面を有する板状部材とすることができる。例えば、仕切板15は、1以上の曲面形状の断面を有する板状部材としても、複数の直線状の断面を有する板状部材としても、直線状の断面及び曲線形状の断面の双方を有する板状部材としてもよい。また、室外機100の用途等に応じて、仕切板15を省略できる。
Further, a partition plate 15 is installed inside the housing 10. The inside of the housing 10 is divided into a blower room 15a and a machine room 15b by a partition plate 15. A heat exchanger 1 and an axial fan 3 are arranged in the blower room 15a, and a compressor 5 is arranged in the machine room 15b. Although the partition plate 15 is formed as a plate-shaped member having a single linear cross section in FIG. 1, it can be a plate-shaped member having a cross section of another shape. For example, the partition plate 15 may be a plate-shaped member having one or more curved cross sections or a plate-shaped member having a plurality of linear cross sections, or a plate having both a linear cross section and a curved cross section. It may be a shaped member. Further, the partition plate 15 can be omitted depending on the application of the outdoor unit 100 and the like.
また、室外機100は、筐体10に収容されたベルマウス20を備えている。ベルマウス20は、軸流ファン3の回転により生成された空気流を開口10aに誘導する風路が形成された環状の部材である。ベルマウス20は、筐体10の前面、例えば、前面パネルに設けられた開口10aの周縁部において、筐体10と連結されている。ベルマウス20は、例えば、プレス加工等によって板金を塑性変形させることにより筐体10の前面パネルと一体に形成される。図1においては、軸流ファン3の回転により生成された空気が流入するベルマウス20の流入口20aが示されている。また、図1においては、熱交換器1の第2部分1bと軸流ファン3との間に位置するベルマウス20の第1断面20b、及び軸流ファン3と仕切板15との間に位置するベルマウス20の第2断面20cが示されている。
Further, the outdoor unit 100 includes a bell mouth 20 housed in the housing 10. The bell mouth 20 is an annular member having an air passage for guiding the air flow generated by the rotation of the axial flow fan 3 to the opening 10a. The bell mouth 20 is connected to the housing 10 at the front surface of the housing 10, for example, at the peripheral edge of the opening 10a provided in the front panel. The bell mouth 20 is formed integrally with the front panel of the housing 10 by, for example, plastically deforming the sheet metal by press working or the like. In FIG. 1, the inflow port 20a of the bell mouth 20 into which the air generated by the rotation of the axial flow fan 3 flows is shown. Further, in FIG. 1, the first cross section 20b of the bell mouth 20 located between the second portion 1b of the heat exchanger 1 and the axial flow fan 3, and the position between the axial flow fan 3 and the partition plate 15. The second cross section 20c of the bell mouth 20 is shown.
ベルマウス20は、筐体10内部に吸い込まれた空気を軸流ファン3に誘導し、翼3aへの空気流の流入角度を最適化するように形成される。軸流ファン3は、ベルマウス20に囲まれて筐体10の内部に収容されている。軸流ファン3をベルマウス20で囲むことにより、軸流ファン3の一部がベルマウス20に収容されるため、室外機100の前後方向の幅を小型化することが可能となる。ベルマウス20の他の構造については後述する。
The bell mouth 20 is formed so as to guide the air sucked into the housing 10 to the axial flow fan 3 and optimize the inflow angle of the air flow to the blade 3a. The axial flow fan 3 is surrounded by the bell mouth 20 and housed inside the housing 10. By surrounding the axial fan 3 with the bell mouth 20, a part of the axial fan 3 is housed in the bell mouth 20, so that the width of the outdoor unit 100 in the front-rear direction can be reduced. Other structures of the bell mouth 20 will be described later.
室外機100の駆動時において、室外機100の外部の空気は、軸流ファン3の回転により、筐体10の内部、例えば送風機室15aの内部に誘引され、熱交換器1で熱交換が行われる。また、熱交換器1で熱交換された室外機100の内部の空気は、軸流ファン3の回転により、ベルマウス20、筐体10の開口10a、及びグリル10bを介して室外機100の外部へ排気される。
When the outdoor unit 100 is driven, the air outside the outdoor unit 100 is attracted to the inside of the housing 10 by the rotation of the axial fan 3, for example, the inside of the blower room 15a, and heat exchange is performed by the heat exchanger 1. Will be. Further, the air inside the outdoor unit 100 that has been heat-exchanged by the heat exchanger 1 is sent to the outside of the outdoor unit 100 via the bell mouth 20, the opening 10a of the housing 10, and the grill 10b by the rotation of the axial flow fan 3. Is exhausted to.
次に、ベルマウス20の構造について説明する。図2は、図1のベルマウス20の断面の一部を拡大して示した概略図である。図2の断面は、後述する直管部21の軸AXに沿って切断した断面である。なお、図2では、図1における軸流ファン3の軸3cの方向を黒のブロック矢印で示している。また、図2では、図1と同様に、空気の流れの主流方向を白抜きのブロック矢印で示している。
Next, the structure of the bell mouth 20 will be described. FIG. 2 is an enlarged schematic view showing a part of a cross section of the bell mouth 20 of FIG. The cross section of FIG. 2 is a cross section cut along the axis AX of the straight pipe portion 21 described later. In FIG. 2, the direction of the axis 3c of the axial flow fan 3 in FIG. 1 is indicated by a black block arrow. Further, in FIG. 2, as in FIG. 1, the mainstream direction of the air flow is indicated by a white block arrow.
ベルマウス20は、直管部21と、空気の流れの主流方向の上流側において、直管部21と連なる第1テーパ部23とを有している。
The bell mouth 20 has a straight pipe portion 21 and a first tapered portion 23 connected to the straight pipe portion 21 on the upstream side in the mainstream direction of the air flow.
直管部21は、熱交換器1の側の端部21aと、筐体10の開口10aの側の端部21bとを有している。図2に示すように、直管部21の内面は、直線状となっており、直管部21は、端部21aから端部21bにかけて、二点鎖線で示された軸AXを中心として、内径は同一径となっている。図2に示すように、直管部21の軸AXの延びる方向は、空気の流れの主流方向と概ね平行になる。また、図2に示すように、軸流ファン3の軸3cの方向は、空気の流れの主流方向及び直管部21の軸AXの延びる方向と概ね平行となるように設計できる。なお、図2には示さないが、直管部21は、軸流ファン3の翼3aの外周側に配置されている。
The straight pipe portion 21 has an end portion 21a on the side of the heat exchanger 1 and an end portion 21b on the side of the opening 10a of the housing 10. As shown in FIG. 2, the inner surface of the straight pipe portion 21 is linear, and the straight pipe portion 21 extends from the end portion 21a to the end portion 21b with the axis AX indicated by the alternate long and short dash line as the center. The inner diameter is the same. As shown in FIG. 2, the extending direction of the axis AX of the straight pipe portion 21 is substantially parallel to the mainstream direction of the air flow. Further, as shown in FIG. 2, the direction of the shaft 3c of the axial flow fan 3 can be designed to be substantially parallel to the mainstream direction of the air flow and the extending direction of the shaft AX of the straight pipe portion 21. Although not shown in FIG. 2, the straight pipe portion 21 is arranged on the outer peripheral side of the blade 3a of the axial flow fan 3.
第1テーパ部23は、空気の流れの主流方向において、上流から下流に向けて内径が小さくなる縮小管である。第1テーパ部23は、空気の流れの主流方向において、直管部21の上流側、かつ、熱交換器1の下流側に配置されている。すなわち、第1テーパ部23は、直管部21の熱交換器1の側の端部21aと連なっている。第1テーパ部23の詳細な構造については後述する。
The first tapered portion 23 is a reduced pipe whose inner diameter decreases from upstream to downstream in the mainstream direction of air flow. The first tapered portion 23 is arranged on the upstream side of the straight pipe portion 21 and on the downstream side of the heat exchanger 1 in the mainstream direction of the air flow. That is, the first tapered portion 23 is connected to the end portion 21a of the straight pipe portion 21 on the side of the heat exchanger 1. The detailed structure of the first tapered portion 23 will be described later.
なお、以降の説明においては、ベルマウス20において、第1テーパ部23の内面に沿って流れる空気を、傍流の空気と称する。
In the following description, in the bell mouth 20, the air flowing along the inner surface of the first tapered portion 23 is referred to as sidestream air.
また、ベルマウス20には、直管部21と筐体10の開口10aとの間に連なり、直管部21から開口10aに向けて内径が大きくなる第2テーパ部25を設けることができる。
Further, the bell mouth 20 can be provided with a second tapered portion 25 which is connected between the straight pipe portion 21 and the opening 10a of the housing 10 and whose inner diameter increases from the straight pipe portion 21 toward the opening 10a.
第2テーパ部25は、熱交換器1の側の端部25bと、筐体10の開口10aの側の端部25aとを有している。第2テーパ部25は、空気の流れの主流方向において、上流側に配置された端部25bから、下流側に配置された端部25aに向けて内径が大きくなる拡大管である。第2テーパ部25は、直管部21の下流側、かつ、筐体10の開口10aの上流側に配置されている。すなわち、第2テーパ部25の端部25bは、直管部21の端部21bと連なっている。また、第2テーパ部25の端部25aは、筐体10、例えば、筐体10の前面パネルの開口10aの縁に連なっている。
The second tapered portion 25 has an end portion 25b on the side of the heat exchanger 1 and an end portion 25a on the side of the opening 10a of the housing 10. The second tapered portion 25 is an expansion pipe whose inner diameter increases from the end portion 25b arranged on the upstream side toward the end portion 25a arranged on the downstream side in the mainstream direction of the air flow. The second tapered portion 25 is arranged on the downstream side of the straight pipe portion 21 and on the upstream side of the opening 10a of the housing 10. That is, the end portion 25b of the second tapered portion 25 is connected to the end portion 21b of the straight pipe portion 21. Further, the end portion 25a of the second tapered portion 25 is connected to the edge of the housing 10, for example, the opening 10a of the front panel of the housing 10.
例えば、第2テーパ部25の下流側の端部25aの第2開口径D2は、第1テーパ部23の上流側の端部23a1の第1開口径D1よりも大きくなるように形成できる。第1開口径D1は、軸AXと第1テーパ部23の端部23a1との間の距離であり、端部23a1における第1テーパ部23の内径の半径である。第2開口径D2は、軸AXと第2テーパ部25の端部25aとの間の距離であり、端部25aにおける第2テーパ部25の内径の半径である。
For example, the second opening diameter D2 of the downstream end 25a of the second tapered portion 25 can be formed to be larger than the first opening diameter D1 of the upstream end 23a1 of the first tapered portion 23. The first opening diameter D1 is the distance between the shaft AX and the end portion 23a1 of the first tapered portion 23, and is the radius of the inner diameter of the first tapered portion 23 at the end portion 23a1. The second opening diameter D2 is the distance between the shaft AX and the end portion 25a of the second tapered portion 25, and is the radius of the inner diameter of the second tapered portion 25 at the end portion 25a.
上述したように、ベルマウス20は、プレス加工等の板金の塑性変形により、筐体10の前面パネルと一体に形成される場合があり、プレス加工には金型が用いられる。金型によるプレス加工では、筐体10の前面パネルを金型の下型に保持し、曲げ加工等により板金を金型の下型の方向に屈曲させることにより、ベルマウス20が形成される。第2テーパ部25は、前面パネルに近い位置に形成され、第1テーパ部23は、前面パネルから離れた位置に形成される。第2テーパ部25の下流側の端部25aの第2開口径D2が、第1テーパ部23の上流側の端部23a1の第1開口径D1よりも大きくなるように形成すれば、金型の下型から筐体10の前面パネルを離型する際に、第1テーパ部23の上流側の端部23a1が金型の下型と干渉するのを抑制できる。したがって、第2テーパ部25の下流側の端部25aの第2開口径D2が、第1テーパ部23の上流側の端部23a1の第1開口径D1よりも大きくなるように形成すれば、ベルマウス20の製造効率を向上させることができる。
As described above, the bell mouth 20 may be integrally formed with the front panel of the housing 10 due to plastic deformation of the sheet metal such as press working, and a die is used for the press working. In the press working with the die, the bell mouth 20 is formed by holding the front panel of the housing 10 in the lower die of the die and bending the sheet metal in the direction of the lower die of the die by bending or the like. The second tapered portion 25 is formed at a position close to the front panel, and the first tapered portion 23 is formed at a position away from the front panel. If the second opening diameter D2 of the downstream end 25a of the second tapered portion 25 is formed to be larger than the first opening diameter D1 of the upstream end 23a1 of the first tapered portion 23, the mold is formed. When the front panel of the housing 10 is removed from the lower mold, it is possible to prevent the upstream end portion 23a1 of the first tapered portion 23 from interfering with the lower mold of the mold. Therefore, if the second opening diameter D2 of the downstream end 25a of the second tapered portion 25 is formed to be larger than the first opening diameter D1 of the upstream end 23a1 of the first tapered portion 23, The manufacturing efficiency of the bell mouth 20 can be improved.
なお、図2では、第2テーパ部25の内面は、ベルマウス20の内側に向けて膨らんだ形状であるが、これに限られない。例えば、第2テーパ部25の内面は、直線状であってもよいし、ベルマウス20の内側に向けて膨らんだ形状の内面と直線状の内面とを組み合わせた形状であってもよい。
Note that, in FIG. 2, the inner surface of the second tapered portion 25 has a shape bulging toward the inside of the bell mouth 20, but is not limited to this. For example, the inner surface of the second tapered portion 25 may be linear, or may be a combination of an inner surface having a shape bulging toward the inside of the bell mouth 20 and a straight inner surface.
なお、室外機100の形状又は大きさ等に応じて、第2テーパ部25は省略できる。すなわち、直管部21の端部21bは、筐体10の開口10aに直接的に連ねてもよい。
The second tapered portion 25 can be omitted depending on the shape or size of the outdoor unit 100. That is, the end portion 21b of the straight pipe portion 21 may be directly connected to the opening 10a of the housing 10.
次に、第1テーパ部23の構造及び形状について説明する。
Next, the structure and shape of the first tapered portion 23 will be described.
上述したように、第1テーパ部23は、空気の流れの主流方向において、上流から下流に向けて内径が小さくなる縮小部である。第1テーパ部23は、軸AXの方向に沿った少なくとも一部の第1テーパ部23の長さH1が、軸AXの方向に沿った直管部21の長さH2よりも長くなるように形成される。なお、第1テーパ部23は、第1テーパ部23の周方向の全周において、第1テーパ部23の長さH1が、軸AXの方向に沿った直管部21の長さH2よりも長くなるように形成してもよい。
As described above, the first tapered portion 23 is a reduced portion whose inner diameter decreases from upstream to downstream in the mainstream direction of the air flow. The first tapered portion 23 has a length H1 of at least a part of the first tapered portion 23 along the direction of the axis AX longer than the length H2 of the straight pipe portion 21 along the direction of the axis AX. It is formed. In the first tapered portion 23, the length H1 of the first tapered portion 23 is larger than the length H2 of the straight pipe portion 21 along the direction of the axis AX in the entire circumference of the first tapered portion 23 in the circumferential direction. It may be formed to be long.
少なくとも一部の第1テーパ部23の長さH1が、直管部21の長さH2よりも長くなることは、空気の主流方向における第1テーパ部23の流路の距離が、空気の主流方向における直管部21の流路の距離より大きくなることを意味している。したがって、第1テーパ部23の長さH1を直管部21の長さH2よりも長くすることにより、縮小部である第1テーパ部23における空気の流れの収縮を滑らかにできるため、直管部21における縮流による渦の発生を抑制できる。
The fact that the length H1 of at least a part of the first tapered portion 23 is longer than the length H2 of the straight pipe portion 21 means that the distance of the flow path of the first tapered portion 23 in the mainstream direction of air is the mainstream of air. It means that it is larger than the distance of the flow path of the straight pipe portion 21 in the direction. Therefore, by making the length H1 of the first tapered portion 23 longer than the length H2 of the straight pipe portion 21, the contraction of the air flow in the first tapered portion 23 which is the reduced portion can be smoothed, so that the straight pipe can be smoothed. The generation of vortices due to contraction in the section 21 can be suppressed.
また、直管部21の流路の距離が大きい場合、直管部21の内面からの空気の流れの剥離が、空気の主流方向の下流に向かうにつれて大きくなる。したがって、直管部21の流路の距離が大きい場合、直管部21の上流側で発生する渦が大きくなる可能性がある。直管部21における渦の発生により、直管部21における空気の流路が実質的に狭められる。
Further, when the distance of the flow path of the straight pipe portion 21 is large, the separation of the air flow from the inner surface of the straight pipe portion 21 becomes larger toward the downstream in the mainstream direction of the air. Therefore, when the distance of the flow path of the straight pipe portion 21 is large, the vortex generated on the upstream side of the straight pipe portion 21 may become large. Due to the generation of the vortex in the straight pipe portion 21, the air flow path in the straight pipe portion 21 is substantially narrowed.
しかしながら、上述の構成では、直管部21の長さH2が第1テーパ部23の長さH1よりも短いため、直管部21に生じる渦が大きくなるのを抑制できる。したがって、上述の構成によれば、ベルマウス20における圧力損失を抑制可能な空気調和装置の室外機100を提供できる。
However, in the above configuration, since the length H2 of the straight pipe portion 21 is shorter than the length H1 of the first tapered portion 23, it is possible to suppress an increase in the vortex generated in the straight pipe portion 21. Therefore, according to the above configuration, it is possible to provide the outdoor unit 100 of the air conditioner capable of suppressing the pressure loss in the bell mouth 20.
また、直管部21の端部21aにおいては、傍流の空気が流入することにより、直管部21において空気の流れの剥離が発生し、直管部21の上流側に渦が発生する。また、傍流の空気の流れ方向と空気の主流方向との間の角度が大きくなるにつれて、傍流の空気の流れを空気の主流方向に転向するのが困難になり、直管部21に生じる渦が大きくなる。
Further, at the end portion 21a of the straight pipe portion 21, the inflow of sidestream air causes the air flow to separate from the straight pipe portion 21, and a vortex is generated on the upstream side of the straight pipe portion 21. Further, as the angle between the flow direction of the sidestream air and the mainstream direction of the air increases, it becomes difficult to divert the flow of the sidestream air toward the mainstream direction of the air, and the vortex generated in the straight pipe portion 21 is generated. growing.
しかしながら、少なくとも一部の第1テーパ部23の長さH1を、直管部21の長さH2よりも長くすることにより、第1テーパ部23において傍流の空気の流れを空気の主流方向に転向するための風路距離を確保できる。したがって、直管部21の端部21aにおける空気の流れの剥離による渦の発生を抑制できる。また、第1テーパ部23の長さH1に対する直管部21の長さH2の比率が小さくなるため、直管部21に生じる渦が大きくなるのを抑制できる。したがって、第1テーパ部23の長さH1を、直管部21の長さH2よりも長くすることにより、直管部21における空気の流れの剥離による渦を抑制できる。したがって、当該構成によれば、ベルマウス20における圧力損失を抑制可能な空気調和装置の室外機100を提供できる。
However, by making the length H1 of at least a part of the first tapered portion 23 longer than the length H2 of the straight pipe portion 21, the flow of the sidestream air in the first tapered portion 23 is directed in the mainstream direction of the air. It is possible to secure the air passage distance for this. Therefore, it is possible to suppress the generation of a vortex due to the separation of the air flow at the end portion 21a of the straight pipe portion 21. Further, since the ratio of the length H2 of the straight pipe portion 21 to the length H1 of the first tapered portion 23 becomes small, it is possible to suppress an increase in the vortex generated in the straight pipe portion 21. Therefore, by making the length H1 of the first tapered portion 23 longer than the length H2 of the straight pipe portion 21, it is possible to suppress the vortex due to the separation of the air flow in the straight pipe portion 21. Therefore, according to the configuration, it is possible to provide the outdoor unit 100 of the air conditioner capable of suppressing the pressure loss in the bell mouth 20.
また、少なくとも一部の第1テーパ部23の長さH1を、直管部21の長さH2よりも長くすることにより、第1テーパ部23において傍流の空気の流れを空気の主流方向に転向できるため、軸流ファン3の翼3aの前縁における負荷を低減できる。したがって、軸流ファン3の電力の低入力設計が可能となり、空気調和装置の室外機100の省電力化が可能となる。
Further, by making the length H1 of at least a part of the first tapered portion 23 longer than the length H2 of the straight pipe portion 21, the flow of the sidestream air in the first tapered portion 23 is directed in the mainstream direction of the air. Therefore, the load on the leading edge of the blade 3a of the axial flow fan 3 can be reduced. Therefore, it is possible to design a low power input of the axial fan 3, and it is possible to save power of the outdoor unit 100 of the air conditioner.
第1テーパ部23は、ベルマウス20の空気の流入口20aを形成する第1屈曲部23aと、直管部21と連なり、第1屈曲部23aよりも内径が小さい第2屈曲部23bとを有するように形成できる。第1屈曲部23a及び第2屈曲部23bは、軸AXの方向において、第1テーパ部23の両端に位置しており、第1屈曲部23aは、空気の流れの主流方向において、第2屈曲部23bの上流側に位置している。図2に示すように、空気の流れの主流方向において、上流側に位置する第1屈曲部23aの端部23a1は、空気の流入口20aを形成している。また、空気の流れの主流方向において、下流側に位置する第2屈曲部23bの端部23b1は、直管部21の端部21aと連なっている。
The first tapered portion 23 connects the first bent portion 23a forming the air inlet 20a of the bell mouth 20 and the second bent portion 23b which is connected to the straight pipe portion 21 and has an inner diameter smaller than that of the first bent portion 23a. Can be formed to have. The first bent portion 23a and the second bent portion 23b are located at both ends of the first tapered portion 23 in the direction of the axis AX, and the first bent portion 23a is the second bent portion 23a in the mainstream direction of the air flow. It is located on the upstream side of the portion 23b. As shown in FIG. 2, the end portion 23a1 of the first bent portion 23a located on the upstream side in the mainstream direction of the air flow forms the air inlet 20a. Further, the end portion 23b1 of the second bent portion 23b located on the downstream side in the mainstream direction of the air flow is connected to the end portion 21a of the straight pipe portion 21.
第1テーパ部23に第1屈曲部23aと第2屈曲部23bとを設けることにより、第1屈曲部23a及び第2屈曲部23bの形状又は大きさを別個に調整して、ベルマウス20の形状又は大きさの最適化設計を行うことが可能となる。例えば、第1屈曲部23aにおいて、傍流の空気流れを第1屈曲部23aの内面に沿って第1テーパ部23に流入させ、第2屈曲部23bにおいて、傍流の空気の流れを空気の主流方向に転向させることが可能となる。
By providing the first bent portion 23a and the second bent portion 23b in the first tapered portion 23, the shapes or sizes of the first bent portion 23a and the second bent portion 23b can be adjusted separately to adjust the shape or size of the bell mouth 20. It is possible to perform an optimized design of shape or size. For example, in the first bent portion 23a, the air flow of the side flow flows into the first tapered portion 23 along the inner surface of the first bent portion 23a, and in the second bent portion 23b, the air flow of the side flow is directed in the main flow direction of the air. It is possible to convert to.
また、第1テーパ部23は、第1屈曲部23aと第2屈曲部23bとに連なる連結部23cを有するように形成できる。連結部23cは、空気の流れの主流方向において、上流側に位置する端部23c1と、下流側に位置する端部23c2とを有している。連結部23cの端部23c1は、空気の流れの主流方向における第1屈曲部23aの下流側の端部23a2と連なっている。連結部23cの端部23c2は、空気の流れの主流方向における第2屈曲部23bの上流側の端部23b2と連なっている。連結部23cは、端部23c1から端部23c2に向けて、内径が小さくなっている。
Further, the first tapered portion 23 can be formed so as to have a connecting portion 23c connected to the first bent portion 23a and the second bent portion 23b. The connecting portion 23c has an end portion 23c1 located on the upstream side and an end portion 23c2 located on the downstream side in the mainstream direction of the air flow. The end portion 23c1 of the connecting portion 23c is connected to the end portion 23a2 on the downstream side of the first bent portion 23a in the mainstream direction of the air flow. The end portion 23c2 of the connecting portion 23c is connected to the end portion 23b2 on the upstream side of the second bent portion 23b in the mainstream direction of the air flow. The inner diameter of the connecting portion 23c is reduced from the end portion 23c1 toward the end portion 23c2.
第1テーパ部23に連結部23cを設けることにより、第1屈曲部23aの内面に沿って第1テーパ部23に流入した傍流の空気の流れを、連結部23cの内面に沿った状態で、第2屈曲部23bに流入できる。したがって、第1テーパ部23に連結部23cを設けることにより、第1テーパ部23における空気の流れの剥離を抑制できる。
By providing the connecting portion 23c in the first tapered portion 23, the flow of the sidestream air flowing into the first tapered portion 23 along the inner surface of the first bent portion 23a can be flowed along the inner surface of the connecting portion 23c. It can flow into the second bent portion 23b. Therefore, by providing the connecting portion 23c in the first tapered portion 23, it is possible to suppress the separation of the air flow in the first tapered portion 23.
なお、連結部23cは、室外機100の形状及び大きさ等に応じて省略することができる。すなわち、第1テーパ部23は、第1屈曲部23aの下流側の端部23a2が、第2屈曲部23bの端部23b2と直接に連なるように構成できる。
The connecting portion 23c can be omitted depending on the shape and size of the outdoor unit 100. That is, the first tapered portion 23 can be configured such that the downstream end portion 23a2 of the first bent portion 23a is directly connected to the end portion 23b2 of the second bent portion 23b.
空気が流入する上流側から下流側に延びる第1屈曲部23aの内面は、例えば、図2に示すように、ベルマウス20の内側に向けて膨らんだ形状、すなわち、ベルマウス20の径方向内側に向けて曲線形状に屈曲した形状とすることができる。また、軸AXの方向における、第2屈曲部23bの内面は、ベルマウス20の内側に向けて膨らんだ形状、すなわち、ベルマウス20の径方向内側に向けて曲線形状に屈曲した形状となっている。また、連結部23cの内面形状の一例は、図2に示すように直線状である。
As shown in FIG. 2, for example, the inner surface of the first bent portion 23a extending from the upstream side to the downstream side where air flows in has a shape bulging toward the inside of the bell mouth 20, that is, the radial inside of the bell mouth 20. It can be curved in a curved shape toward. Further, the inner surface of the second bent portion 23b in the direction of the axis AX has a shape that bulges toward the inside of the bell mouth 20, that is, a shape that bends in a curved shape toward the inside of the bell mouth 20 in the radial direction. There is. Further, an example of the inner surface shape of the connecting portion 23c is a linear shape as shown in FIG.
なお、第1屈曲部23aの一部又は全部は、室外機100の内部構造等に応じて、ベルマウス20の外側に向けて膨らんだ形状、すなわち、ベルマウス20の径方向外側に向けて曲線形状に屈曲した形状とすることができる。第1屈曲部23aをベルマウス20の径方向外側に向けて屈曲すれば、第1屈曲部23aを径方向内側に向けて屈曲した場合と比較して、ベルマウス20の流入口20aの開口径の拡がりの抑制が容易となるため、ベルマウス20の小型化を図ることができる。
A part or all of the first bent portion 23a has a shape bulging toward the outside of the bell mouth 20, that is, a curve toward the outside in the radial direction of the bell mouth 20, depending on the internal structure of the outdoor unit 100 and the like. The shape can be bent into a shape. When the first bent portion 23a is bent outward in the radial direction of the bell mouth 20, the opening diameter of the inflow port 20a of the bell mouth 20 is compared with the case where the first bent portion 23a is bent in the radial direction. Since it becomes easy to suppress the spread of the bell mouth 20, the bell mouth 20 can be miniaturized.
例えば、図1の第2断面20cにおいて、第1屈曲部23aは、ベルマウス20の径方向外側に向けて曲線形状に屈曲した形状とすることができる。第2断面20cにおいて、第1屈曲部23aをベルマウス20の径方向外側に向けて屈曲すれば、図1の仕切板15の面に沿ってベルマウス20の流入口側の内面を延ばし、仕切板15を沿って流れる空気を、ベルマウス20に円滑に流入させることができる。
For example, in the second cross section 20c of FIG. 1, the first bent portion 23a can be bent in a curved shape toward the radial outer side of the bell mouth 20. In the second cross section 20c, if the first bent portion 23a is bent toward the radial outer side of the bell mouth 20, the inner surface of the bell mouth 20 on the inflow port side is extended along the surface of the partition plate 15 of FIG. 1, and the partition is formed. The air flowing along the plate 15 can be smoothly flowed into the bell mouth 20.
以降の説明では、第1屈曲部23aの内面を形成する線を第1稜線23a3とする。第1稜線23a3は、空気が流入する第1屈曲部23aの上流側から第1屈曲部23aの下流側に延びている。また、第2屈曲部23bの内面を形成する線を第2稜線23b3とする。第2稜線23b3は、第1稜線23a3の延長線上に配置されている。また、連結部23cの内面を形成し、かつ、第1稜線23a3と第2稜線23b3との間につながる線を第3稜線23c3とする。
In the following description, the line forming the inner surface of the first bent portion 23a will be referred to as the first ridge line 23a3. The first ridge line 23a3 extends from the upstream side of the first bent portion 23a into which air flows to the downstream side of the first bent portion 23a. Further, the line forming the inner surface of the second bent portion 23b is referred to as a second ridge line 23b3. The second ridge line 23b3 is arranged on an extension line of the first ridge line 23a3. Further, the line forming the inner surface of the connecting portion 23c and connecting between the first ridge line 23a3 and the second ridge line 23b3 is referred to as the third ridge line 23c3.
図3は、実施の形態に係る第1稜線23a3における第1曲率半径R1と第1中心角θ1との関係を示す概略図である。図3において、第1稜線23a3の曲率中心は点Oで示され、第1屈曲部23aの一方の端部23a1は点P1で示され、第1屈曲部23aの他方の端部23a2は点P2で示されている。線分OP1及び線分OP2の長さは同一であり、第1稜線23a3の第1曲率半径R1として定めることができる。第1中心角θ1は、点Oを中心とした線分OP1と線分OP2との間の角度として定めることができる。
FIG. 3 is a schematic diagram showing the relationship between the first radius of curvature R1 and the first central angle θ1 on the first ridge line 23a3 according to the embodiment. In FIG. 3, the center of curvature of the first ridge 23a3 is indicated by a point O, one end 23a1 of the first bent portion 23a is indicated by a point P1, and the other end 23a2 of the first bent portion 23a is indicated by a point P2. Indicated by. The lengths of the line segment OP1 and the line segment OP2 are the same, and can be determined as the first radius of curvature R1 of the first ridge line 23a3. The first central angle θ1 can be determined as an angle between the line segment OP1 and the line segment OP2 centered on the point O.
第1テーパ部23の形状及び大きさは、第1稜線23a3の第1曲率半径R1、第1稜線23a3の第1中心角θ1、第2稜線23b3の第2曲率半径R2、及び第2稜線23b3の第2中心角θ2に基づいて定めることができる。
The shape and size of the first tapered portion 23 are the first radius of curvature R1 of the first ridge line 23a3, the first central angle θ1 of the first ridge line 23a3, the second radius of curvature R2 of the second ridge line 23b3, and the second ridge line 23b3. It can be determined based on the second central angle θ2 of.
例えば、第1稜線23a3の屈曲形状は、第1中心角θ1を一定とした場合、第1曲率半径R1が大きくなるにつれて、第1稜線23a3の屈曲形状が直線状に近づくため、緩やかになる。また、第1稜線23a3は、第1曲率半径R1を一定とした場合、第1中心角θ1が小さくなるにつれて、第1稜線23a3の長さが小さくなるため、第1屈曲部23aの小型化が可能になる。
For example, when the first central angle θ1 is constant, the bent shape of the first ridge line 23a3 becomes gentle because the bent shape of the first ridge line 23a3 approaches a straight line as the first radius of curvature R1 increases. Further, in the first ridge line 23a3, when the first radius of curvature R1 is constant, the length of the first ridge line 23a3 becomes smaller as the first central angle θ1 becomes smaller, so that the first bent portion 23a can be miniaturized. It will be possible.
また、図4に示すように、第2稜線23b3における第2曲率半径R2と第2中心角θ2との関係においても、図3及び図3に関する上述の説明と同様の関係が成立する。図4は、実施の形態に係る第1テーパ部23における、第1曲率半径R1と第2曲率半径R2との関係を示す概略図である。図4では、第1稜線23a3の第1曲率半径R1及び第2稜線23b3の第2曲率半径R2の大きさは、矢印によって示されている。
Further, as shown in FIG. 4, the relationship between the second radius of curvature R2 and the second central angle θ2 at the second ridge line 23b3 also holds the same relationship as described above with respect to FIGS. 3 and 3. FIG. 4 is a schematic view showing the relationship between the first radius of curvature R1 and the second radius of curvature R2 in the first tapered portion 23 according to the embodiment. In FIG. 4, the magnitudes of the first radius of curvature R1 of the first ridge line 23a3 and the second radius of curvature R2 of the second ridge line 23b3 are indicated by arrows.
すなわち、第2稜線23b3の屈曲形状は、第2中心角θ2を一定とした場合、第2曲率半径R2が大きくなるにつれて、第2稜線23b3の屈曲形状が直線状に近づくため、緩やかになる。また、第2稜線23b3は、第2曲率半径R2を一定とした場合、第2中心角θ2が小さくなるにつれて、第2稜線23b3の長さが小さくなるため、第2屈曲部23bの小型化が可能になる。
That is, when the second central angle θ2 is constant, the bending shape of the second ridge line 23b3 becomes gentle because the bending shape of the second ridge line 23b3 approaches a straight line as the second radius of curvature R2 increases. Further, in the second ridge line 23b3, when the second radius of curvature R2 is constant, the length of the second ridge line 23b3 becomes smaller as the second central angle θ2 becomes smaller, so that the second bent portion 23b can be miniaturized. It will be possible.
また、連結部23cの内面が直線状である場合、第1テーパ部23の形状及び大きさは、第3稜線23c3の長さLに基づいて定めることができる。長さLが小さくなるにつれて、軸流ファン3の軸3cの方向における連結部23cの幅が小さくなるので、連結部23cの小型化が可能となる。
Further, when the inner surface of the connecting portion 23c is linear, the shape and size of the first tapered portion 23 can be determined based on the length L of the third ridge line 23c3. As the length L becomes smaller, the width of the connecting portion 23c in the direction of the shaft 3c of the axial flow fan 3 becomes smaller, so that the connecting portion 23c can be miniaturized.
図4に示すように、第1テーパ部23は、第1稜線23a3の第1曲率半径R1が、第2稜線23b3の第2曲率半径R2よりも大きくなるように形成できる。すなわち、第1テーパ部23において、第1稜線23a3で形成された第1屈曲部23aの曲率が、第2稜線23b3で形成された第2屈曲部23bの曲率よりも小さくできる。なお、曲率は、曲率半径の逆数である。
As shown in FIG. 4, the first tapered portion 23 can be formed so that the first radius of curvature R1 of the first ridge line 23a3 is larger than the second radius of curvature R2 of the second ridge line 23b3. That is, in the first tapered portion 23, the curvature of the first bent portion 23a formed by the first ridge line 23a3 can be made smaller than the curvature of the second bent portion 23b formed by the second ridge line 23b3. The curvature is the reciprocal of the radius of curvature.
この構成によれば、第1テーパ部23に、傍流の空気が流入したとしても、第1稜線23a3の第1中心角θ1が大きく、傍流の空気を大きく偏向させる場合でも、第1稜線23a3に沿って空気を流通させることができる。また、第1テーパ部23を通過した空気は、第2屈曲部23bの第2稜線23b3に沿って流通し、軸流ファン3の軸3cの方向に空気を流入させることができる。すなわち、ベルマウス20は、第1テーパ部23を有することにより、傍流の空気を剥離させずに軸流ファン3へ誘導するとともに、空気の主流の方向と同一方向に直管部21に流入させることができる。
According to this configuration, even if the sidestream air flows into the first tapered portion 23, the first central angle θ1 of the first ridgeline 23a3 is large, and even when the sidestream air is greatly deflected, the first ridgeline 23a3 is formed. Air can be circulated along. Further, the air that has passed through the first tapered portion 23 flows along the second ridge line 23b3 of the second bent portion 23b, and the air can flow in the direction of the shaft 3c of the axial flow fan 3. That is, by having the first tapered portion 23, the bell mouth 20 guides the sidestream air to the axial fan 3 without separating it, and causes the air to flow into the straight pipe portion 21 in the same direction as the mainstream direction of the air. be able to.
室外機100は、空気の流れを生成する軸流ファン3を通常有している。室外機100では、軸流ファン3の翼3aを直管部21の内部に配置することにより、室外機100の小型化が実現できる。しかしながら、直管部21の内部の空気の流れに圧力損失が生じる場合、軸流ファン3で送風性能が低下するため、送風性能の低下を補償するために、軸流ファン3における消費電力を増加させる必要があった。
The outdoor unit 100 usually has an axial fan 3 that generates an air flow. In the outdoor unit 100, the size of the outdoor unit 100 can be reduced by arranging the blades 3a of the axial flow fan 3 inside the straight pipe portion 21. However, when a pressure loss occurs in the air flow inside the straight pipe portion 21, the ventilation performance of the axial fan 3 deteriorates, so that the power consumption of the axial fan 3 is increased in order to compensate for the deterioration of the ventilation performance. I needed to let you.
しかしながら、この構成によれば、第1テーパ部23における空気の流れの剥離による渦の発生を抑制し、直管部21の内部の空気の流れに圧力損失が生じるのを抑制できる。また、直管部21の内部での空気の流れの分布を均一にすることができるため、軸流ファン3の送風性能が低下することも抑制できる。また、室外機100の小型化を実現するために軸流ファン3の翼3aを直管部21の内部に配置した場合であっても、軸流ファン3の送風性能を維持するために、軸流ファン3の消費電力を増加させる必要がない。したがって、この構成によれば、小型化と消費電力の削減とを実現可能な室外機100を提供することができる。
However, according to this configuration, it is possible to suppress the generation of a vortex due to the separation of the air flow in the first tapered portion 23 and suppress the pressure loss in the air flow inside the straight pipe portion 21. Further, since the distribution of the air flow inside the straight pipe portion 21 can be made uniform, it is possible to suppress the deterioration of the blowing performance of the axial flow fan 3. Further, even when the blade 3a of the axial fan 3 is arranged inside the straight pipe portion 21 in order to realize the miniaturization of the outdoor unit 100, the shaft is maintained in order to maintain the ventilation performance of the axial fan 3. It is not necessary to increase the power consumption of the flow fan 3. Therefore, according to this configuration, it is possible to provide the outdoor unit 100 that can realize miniaturization and reduction of power consumption.
また、第1テーパ部23は、第1屈曲部23aと第2屈曲部23bとに連なる連結部23cを有するように形成できる。第1テーパ部23に連結部23cを設けることにより、第1屈曲部23aの第1稜線23a3に沿って流入した空気の流れが、第1屈曲部23aと第2屈曲部23bとの境界で剥離されるのを抑制することができる。特に、第1屈曲部23aと第2屈曲部23bとの間を直線状に延びる第3稜線23c3を有するように連結部23cを構成すれば、上述の空気の流れを第3稜線23c3に沿って滑らかに誘導できるため、第1テーパ部23での空気の流れの剥離を更に抑制することができる。
Further, the first tapered portion 23 can be formed so as to have a connecting portion 23c connected to the first bent portion 23a and the second bent portion 23b. By providing the connecting portion 23c in the first tapered portion 23, the air flow flowing along the first ridge line 23a3 of the first bent portion 23a is separated at the boundary between the first bent portion 23a and the second bent portion 23b. It can be suppressed. In particular, if the connecting portion 23c is configured to have a third ridge line 23c3 extending linearly between the first bent portion 23a and the second bent portion 23b, the above-mentioned air flow is directed along the third ridge line 23c3. Since it can be guided smoothly, it is possible to further suppress the separation of the air flow at the first tapered portion 23.
また、第1テーパ部23の形状を、軸流ファン3の軸3cを基準として周方向に変化させることにより、直管部21に流入する空気の流れの分布を更に均一にできるとともに、ベルマウス20の小型化をよりフレキシブルに実現することができる。
Further, by changing the shape of the first tapered portion 23 in the circumferential direction with reference to the axis 3c of the axial flow fan 3, the distribution of the air flow flowing into the straight pipe portion 21 can be made more uniform, and the bell mouth The miniaturization of 20 can be realized more flexibly.
例えば、前述したように、第1テーパ部23の形状及び大きさは、第3稜線23c3の長さLに基づいて定めることができる。したがって、第3稜線23c3の長さLを、第1テーパ部23の周方向に変化させることにより、第1テーパ部23の形状及び大きさをフレキシブルに設計できる。例えば、周方向における第1屈曲部23a及び第2屈曲部23bの形状及び大きさを維持したまま、第3稜線23c3の長さLを短くすることにより、第1テーパ部23での空気の流れの剥離を抑制しつつ、第1テーパ部23の径方向の幅を縮小できる。
For example, as described above, the shape and size of the first tapered portion 23 can be determined based on the length L of the third ridge line 23c3. Therefore, the shape and size of the first tapered portion 23 can be flexibly designed by changing the length L of the third ridge line 23c3 in the circumferential direction of the first tapered portion 23. For example, by shortening the length L of the third ridge line 23c3 while maintaining the shapes and sizes of the first bent portion 23a and the second bent portion 23b in the circumferential direction, the air flow in the first tapered portion 23. The width of the first tapered portion 23 in the radial direction can be reduced while suppressing the peeling of the first tapered portion 23.
空気調和装置の室外機100に用いられるプロペラファン等の軸流ファン3の周囲に設けられるベルマウス20は、室外機100の小型化の影響により、狭い空間に設置される場合がある。しかしながら、周方向における第1屈曲部23a及び第2屈曲部23bの形状及び大きさを維持したまま、第3稜線23c3の長さLを短くすることにより、狭い空間においても、送風性能の悪化の抑制と、ベルマウス20の小型化とを図ることができる。
The bell mouth 20 provided around the axial fan 3 such as the propeller fan used in the outdoor unit 100 of the air conditioner may be installed in a narrow space due to the influence of the miniaturization of the outdoor unit 100. However, by shortening the length L of the third ridge line 23c3 while maintaining the shape and size of the first bent portion 23a and the second bent portion 23b in the circumferential direction, the ventilation performance is deteriorated even in a narrow space. It is possible to suppress the bell mouth 20 and reduce the size of the bell mouth 20.
また、第1テーパ部23の形状及び大きさは、軸AXの方向に沿った第1テーパ部23の長さH1に基づいて定めることができる。長さH1を、第1テーパ部23の周方向に変化させることにより、第1テーパ部23の形状及び大きさをフレキシブルに設計できる。
Further, the shape and size of the first tapered portion 23 can be determined based on the length H1 of the first tapered portion 23 along the direction of the axis AX. By changing the length H1 in the circumferential direction of the first tapered portion 23, the shape and size of the first tapered portion 23 can be flexibly designed.
また、第1テーパ部23の形状及び大きさは、第1稜線23a3の第1曲率半径R1、第1稜線23a3の第1中心角θ1、第2稜線23b3の第2曲率半径R2、及び第2稜線23b3の第2中心角θ2のうちの少なくとも1つに基づいて定めることができる。第1曲率半径R1、第1中心角θ1、第2曲率半径R2、及び第2中心角θ2のうちの少なくとも1つを、第1テーパ部23の周方向に変化させることにより、第1テーパ部23の形状及び大きさをフレキシブルに設計できる。
The shape and size of the first tapered portion 23 are the first radius of curvature R1 of the first ridge line 23a3, the first central angle θ1 of the first ridge line 23a3, the second radius of curvature R2 of the second ridge line 23b3, and the second. It can be determined based on at least one of the second central angles θ2 of the ridge line 23b3. By changing at least one of the first radius of curvature R1, the first central angle θ1, the second radius of curvature R2, and the second central angle θ2 in the circumferential direction of the first tapered portion 23, the first tapered portion The shape and size of the 23 can be flexibly designed.
軸AXを基準として、第1テーパ部23の形状を周方向に変化させる実施の形態の一例を、図1のように、上面視においてL字形状の熱交換器1を有する室外機100を例として説明する。なお、以降の説明はあくまでも実施の形態の一例であり、この実施の形態によって本開示の内容を限定することを意図するものではない。
An example of an embodiment in which the shape of the first tapered portion 23 is changed in the circumferential direction with respect to the shaft AX is an example of an outdoor unit 100 having an L-shaped heat exchanger 1 in a top view as shown in FIG. It is explained as. The following description is merely an example of the embodiment, and is not intended to limit the content of the present disclosure by this embodiment.
前述したように、熱交換器1は、筐体10の後面側に配置された第1部分1aと、筐体10の左面側に配置された第2部分1bとを有している。第1部分1aは、筐体10の後面側において、軸流ファン3の軸3cの方向と交差する方向に延びている。また、第2部分1bは、第1部分1aと交差する方向に延び、第1テーパ部23と間隔をあけて配置されている。また、筐体10の内部には、仕切板15が設置されている。
As described above, the heat exchanger 1 has a first portion 1a arranged on the rear surface side of the housing 10 and a second portion 1b arranged on the left surface side of the housing 10. The first portion 1a extends in a direction intersecting the direction of the shaft 3c of the axial flow fan 3 on the rear surface side of the housing 10. Further, the second portion 1b extends in a direction intersecting with the first portion 1a and is arranged at a distance from the first tapered portion 23. Further, a partition plate 15 is installed inside the housing 10.
上述のような室外機100においては、ベルマウス20の周方向に配置されている構成要素が異なるため、軸流ファン3が回転すると、空気の主流方向と異なる傍流の空気の流れが発生する。傍流の空気が軸流ファン3に流入と、空気が一方向から流れる場合と比較してファン効率等の送風性能が低下する可能性がある。
In the outdoor unit 100 as described above, since the components arranged in the circumferential direction of the bell mouth 20 are different, when the axial flow fan 3 rotates, a sidestream air flow different from the mainstream direction of the air is generated. When the sidestream air flows into the axial fan 3, there is a possibility that the fan efficiency and other ventilation performance will be lower than when the air flows from one direction.
図1では、第2部分1bと軸流ファン3との間に位置するベルマウス20の第1断面20b、及び軸流ファン3と仕切板15との間に位置するベルマウス20の第2断面20cが示されている。図5は、図1のベルマウス20の第1断面20b及び第2断面20cを拡大して示した概略図である。第1断面20bでは、第1屈曲部23aの内面を形成する第1稜線23a3の延長線上に第2部分1bが配置されている。第2断面20cでは、第1屈曲部23aの内面を形成する第1稜線23a3の延長線上に第2部分1bが配置されていない。
In FIG. 1, the first cross section 20b of the bell mouth 20 located between the second portion 1b and the axial flow fan 3 and the second cross section of the bell mouth 20 located between the axial flow fan 3 and the partition plate 15. 20c is shown. FIG. 5 is an enlarged schematic view showing a first cross section 20b and a second cross section 20c of the bell mouth 20 of FIG. 1. In the first cross section 20b, the second portion 1b is arranged on the extension line of the first ridge line 23a3 forming the inner surface of the first bent portion 23a. In the second cross section 20c, the second portion 1b is not arranged on the extension line of the first ridge line 23a3 forming the inner surface of the first bent portion 23a.
この実施の形態において、第1屈曲部23aの内面は、第1上流側領域33a1と、第2上流側領域33a2とからなる。第1上流側領域33a1及び第2上流側領域33a2は、第1稜線23a3により形成されている。第1上流側領域33a1を形成する第1稜線23a3の延長線上には、第2部分1bが配置されている。すなわち、図5の第1断面20bで示された第1屈曲部23aの内面は、第1上流側領域33a1の一例である。また、第2上流側領域33a2を形成する第1稜線23a3の延長線上には、第2部分1bが配置されていない。すなわち、図5の第2断面20cで示された第1屈曲部23aの内面は、第2上流側領域33a2の一例である。また、この実施の形態では、第1上流側領域33a1を形成する第1稜線23a3の形状は、ベルマウス20の内側に向けて膨らんだ形状となる。なお、図5においては、第2上流側領域33a2を形成する第1稜線23a3は、前記ベルマウスの内側に向けて膨らんでいるが、この形状に限られない。例えば、第2上流側領域33a2を形成する第1稜線23a3は、ベルマウス20の外側に向けて膨らんだ形状であってもよい。
In this embodiment, the inner surface of the first bent portion 23a is composed of a first upstream side region 33a1 and a second upstream side region 33a2. The first upstream side region 33a1 and the second upstream side region 33a2 are formed by the first ridge line 23a3. The second portion 1b is arranged on the extension line of the first ridge line 23a3 forming the first upstream side region 33a1. That is, the inner surface of the first bent portion 23a shown in the first cross section 20b of FIG. 5 is an example of the first upstream side region 33a1. Further, the second portion 1b is not arranged on the extension line of the first ridge line 23a3 forming the second upstream side region 33a2. That is, the inner surface of the first bent portion 23a shown in the second cross section 20c of FIG. 5 is an example of the second upstream side region 33a2. Further, in this embodiment, the shape of the first ridge line 23a3 forming the first upstream side region 33a1 is a shape bulging toward the inside of the bell mouth 20. In FIG. 5, the first ridge line 23a3 forming the second upstream region 33a2 bulges toward the inside of the bell mouth, but is not limited to this shape. For example, the first ridge line 23a3 forming the second upstream region 33a2 may have a shape bulging toward the outside of the bell mouth 20.
また、第2屈曲部23bの内面は、第1下流側領域33b1と、第2下流側領域33b2とからなる。第1下流側領域33b1及び第2下流側領域33b2は、第2稜線23b3により形成されている。第1下流側領域33b1を形成する第2稜線23b3は、第1上流側領域33a1の第1稜線23a3の延長線上に配置されている。すなわち、図5の第1断面20bで示された第2屈曲部23bの内面は、第1下流側領域33b1の一例である。また、第2下流側領域33b2を形成する第2稜線23b3は、第2上流側領域33a2の第1稜線23a3の延長線上に配置されている。すなわち、図5の第2断面20cで示された第2屈曲部23bの内面は、第2下流側領域33b2の一例である。また、第1下流側領域33b1及び第2下流側領域33b2は、ベルマウス20の内側に向けて膨らんだ形状となる。
Further, the inner surface of the second bent portion 23b is composed of a first downstream side region 33b1 and a second downstream side region 33b2. The first downstream side region 33b1 and the second downstream side region 33b2 are formed by the second ridge line 23b3. The second ridge line 23b3 forming the first downstream side region 33b1 is arranged on an extension line of the first ridge line 23a3 of the first upstream side region 33a1. That is, the inner surface of the second bent portion 23b shown in the first cross section 20b of FIG. 5 is an example of the first downstream side region 33b1. Further, the second ridge line 23b3 forming the second downstream side region 33b2 is arranged on an extension line of the first ridge line 23a3 of the second upstream side region 33a2. That is, the inner surface of the second bent portion 23b shown in the second cross section 20c of FIG. 5 is an example of the second downstream side region 33b2. Further, the first downstream side region 33b1 and the second downstream side region 33b2 have a shape bulging toward the inside of the bell mouth 20.
また、連結部23cの内面は、第1中間領域33c1と第2中間領域33c2とからなる。第1中間領域33c1及び第2中間領域33c2は、第3稜線23c3により形成される。第1中間領域33c1を形成する第3稜線23c3は、第1上流側領域33a1を形成する第1稜線23a3と第1下流側領域33b1を形成する第2稜線23b3との間につながっている。すなわち、図5の第1断面20bで示された連結部23cの内面は、第1中間領域33c1の一例である。また、第2中間領域33c2を形成する第3稜線23c3は、第2上流側領域33a2を形成する第1稜線23a3と、第2下流側領域33b2を形成する第2稜線23b3との間につながっている。すなわち、図5の第2断面20cで示された連結部23cの内面は、第2中間領域33c2の一例である。第3稜線23c3は、例えば、直線状に形成される。
Further, the inner surface of the connecting portion 23c is composed of a first intermediate region 33c1 and a second intermediate region 33c2. The first intermediate region 33c1 and the second intermediate region 33c2 are formed by the third ridge line 23c3. The third ridge line 23c3 forming the first intermediate region 33c1 is connected between the first ridge line 23a3 forming the first upstream side region 33a1 and the second ridge line 23b3 forming the first downstream side region 33b1. That is, the inner surface of the connecting portion 23c shown in the first cross section 20b of FIG. 5 is an example of the first intermediate region 33c1. Further, the third ridge line 23c3 forming the second intermediate region 33c2 is connected between the first ridge line 23a3 forming the second upstream side region 33a2 and the second ridge line 23b3 forming the second downstream side region 33b2. There is. That is, the inner surface of the connecting portion 23c shown in the second cross section 20c of FIG. 5 is an example of the second intermediate region 33c2. The third ridge line 23c3 is formed, for example, in a straight line.
この実施の形態においては、第1上流側領域33a1を形成する第1稜線23a3の第1中心角θ1aは、第2上流側領域33a2を形成する第1稜線23a3の第1中心角θ1bと異ならせることができる。例えば、第1上流側領域33a1を形成する第1稜線23a3の第1中心角θ1aは、第2上流側領域33a2を形成する第1稜線23a3の第1中心角θ1bよりも小さく形成できる。第2部分1bでは、軸流ファン3の回転により、空気の主流の方向と異なる方向から傍流の空気が流入する。第1上流側領域33a1を形成する第1稜線23a3の第1中心角θ1aを小さくすれば、第1上流側領域33a1を形成する第1稜線23a3は短くなる。しかしながら、第1稜線23a3の第1曲率半径R1を一定に維持すれば、第1上流側領域33a1を形成する第1稜線23a3に沿って傍流の空気を流すことができるため、第1テーパ部23における空気の剥離を低減することができる。また、第1上流側領域33a1を形成する第1稜線23a3の第1中心角θ1aを、第2上流側領域33a2の第1稜線23a3の第1中心角θ1bよりも小さくすることにより、第1テーパ部23の径方向の幅を低減できる。したがって、この構成によれば、ベルマウス20と熱交換器1との間隙が狭い場合であっても、送風性能の悪化の抑制と、ベルマウス20の小型化とを図ることができる。
In this embodiment, the first central angle θ1a of the first ridge line 23a3 forming the first upstream side region 33a1 is different from the first central angle θ1b of the first ridge line 23a3 forming the second upstream side region 33a2. be able to. For example, the first central angle θ1a of the first ridge line 23a3 forming the first upstream side region 33a1 can be formed smaller than the first central angle θ1b of the first ridge line 23a3 forming the second upstream side region 33a2. In the second portion 1b, the sidestream air flows in from a direction different from the mainstream direction of the air due to the rotation of the axial fan 3. If the first central angle θ1a of the first ridge line 23a3 forming the first upstream side region 33a1 is reduced, the first ridge line 23a3 forming the first upstream side region 33a1 becomes shorter. However, if the first radius of curvature R1 of the first ridge line 23a3 is kept constant, sidestream air can flow along the first ridge line 23a3 forming the first upstream side region 33a1, so that the first tapered portion 23 It is possible to reduce the separation of air in. Further, by making the first central angle θ1a of the first ridge line 23a3 forming the first upstream side region 33a1 smaller than the first central angle θ1b of the first ridge line 23a3 of the second upstream side region 33a2, the first taper The radial width of the portion 23 can be reduced. Therefore, according to this configuration, even when the gap between the bell mouth 20 and the heat exchanger 1 is narrow, it is possible to suppress the deterioration of the ventilation performance and to reduce the size of the bell mouth 20.
なお、第1上流側領域33a1を形成する第1稜線23a3の第1中心角θ1aは、上述の関係を満たす限りにおいて、第1テーパ部23の周方向に変化させてもよい。例えば、第1屈曲部23aは、第2部分1bと第1屈曲部23aとの距離が最小となる第1断面20bにおいて、第1稜線23a3の第1中心角θ1aが最小となるように形成できる。また、第2上流側領域33a2を形成する第1稜線23a3の第1中心角θ1bについても、上述の関係を満たす限りにおいて、第1テーパ部23の周方向に変化させてもよい。また、第1稜線23a3の第1曲率半径R1は、第1テーパ部23の周方向に変化させることができる。
The first central angle θ1a of the first ridge line 23a3 forming the first upstream region 33a1 may be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied. For example, the first bent portion 23a can be formed so that the first central angle θ1a of the first ridge line 23a3 is minimized in the first cross section 20b where the distance between the second portion 1b and the first bent portion 23a is minimized. .. Further, the first central angle θ1b of the first ridge line 23a3 forming the second upstream side region 33a2 may also be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied. Further, the first radius of curvature R1 of the first ridge line 23a3 can be changed in the circumferential direction of the first tapered portion 23.
また、この実施の形態においては、第1下流側領域33b1を形成する第2稜線23b3の第2中心角θ2aは、第2下流側領域33b2を形成する第2稜線23b3の第2中心角θ2bと異ならせることができる。例えば、第1下流側領域33b1を形成する第2稜線23b3の第2中心角θ2aは、第2下流側領域33b2を形成する第2稜線23b3の第2中心角θ2bよりも大きく形成できる。第2部分1bを通過し、第1上流側領域33a1の第1稜線23a3に沿って流入した空気の主流の方向と異なる空気は、第1下流側領域33b1を形成する第2稜線23b3に沿って、直管部21に流入される。このとき、第1下流側領域33b1を形成する第2稜線23b3の第2中心角θ2aを大きくすれば、第1下流側領域33b1を形成する第2稜線23b3を長くすることができる。第1下流側領域33b1を形成する第2稜線23b3を長くすれば、第1下流側領域33b1の第2稜線23b3を沿って流れる空気を、軸流ファン3の軸3cの方向により確実に近づけることができる。したがって、第1下流側領域33b1を形成する第2稜線23b3の第2中心角θ2aを大きくすることにより、直管部21の内部での空気の流れの分布をより均一にすることができるため、軸流ファン3の送風性能が低下することを抑制できる。また、第2下流側領域33b2を形成する第2稜線23b3の第2中心角θ2bを小さくすることにより、第1テーパ部23が小型化できるため、室外機100の小型化を実現できる。
Further, in this embodiment, the second central angle θ2a of the second ridge line 23b3 forming the first downstream side region 33b1 is the second central angle θ2b of the second ridge line 23b3 forming the second downstream side region 33b2. Can be different. For example, the second central angle θ2a of the second ridge line 23b3 forming the first downstream side region 33b1 can be formed larger than the second central angle θ2b of the second ridge line 23b3 forming the second downstream side region 33b2. Air that has passed through the second portion 1b and has flowed in along the first ridge line 23a3 of the first upstream side region 33a1 and is different from the mainstream direction of the air is along the second ridge line 23b3 forming the first downstream side region 33b1. , Flows into the straight pipe portion 21. At this time, if the second central angle θ2a of the second ridge line 23b3 forming the first downstream side region 33b1 is increased, the second ridge line 23b3 forming the first downstream side region 33b1 can be lengthened. If the second ridge line 23b3 forming the first downstream side region 33b1 is lengthened, the air flowing along the second ridge line 23b3 of the first downstream side region 33b1 can be surely brought closer to the direction of the shaft 3c of the axial flow fan 3. Can be done. Therefore, by increasing the second central angle θ2a of the second ridge line 23b3 forming the first downstream side region 33b1, the distribution of the air flow inside the straight pipe portion 21 can be made more uniform. It is possible to suppress the deterioration of the ventilation performance of the axial fan 3. Further, by reducing the second central angle θ2b of the second ridge line 23b3 forming the second downstream side region 33b2, the first tapered portion 23 can be miniaturized, so that the outdoor unit 100 can be miniaturized.
なお、第1下流側領域33b1を形成する第2稜線23b3の第2中心角θ2aは、上述の関係を満たす限りにおいて、第1テーパ部23の周方向に変化させてもよい。例えば、第2屈曲部23bは、第2部分1bと第2屈曲部23bとの距離が最小となる第1断面20bにおいて、第2稜線23b3の第2中心角θ2aが最大となるように形成できる。また、第2下流側領域33b2を形成する第2稜線23b3の第2中心角θ2bについても、上述の関係を満たす限りにおいて、第1テーパ部23の周方向に変化させてもよい。また、第2稜線23b3の第2曲率半径R2は、第1テーパ部23の周方向に変化させることができる。
The second central angle θ2a of the second ridge line 23b3 forming the first downstream side region 33b1 may be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied. For example, the second bent portion 23b can be formed so that the second central angle θ2a of the second ridge line 23b3 is maximized in the first cross section 20b where the distance between the second portion 1b and the second bent portion 23b is the minimum. .. Further, the second central angle θ2b of the second ridge line 23b3 forming the second downstream side region 33b2 may also be changed in the circumferential direction of the first tapered portion 23 as long as the above relationship is satisfied. Further, the second radius of curvature R2 of the second ridge line 23b3 can be changed in the circumferential direction of the first tapered portion 23.
また、この実施の形態においては、第1中間領域33c1を形成する第3稜線23c3の長さL1は、第2中間領域33c2の第3稜線23c3の長さL2と異ならせることができる。例えば、第1中間領域33c1を形成する第3稜線23c3の長さL1は、第2中間領域33c2を形成する第3稜線23c3の長さL2よりも短くなるように形成できる。第1中間領域33c1を形成する第3稜線23c3の長さL1を、第2中間領域33c2の第3稜線23c3を形成する長さL2よりも短くすることにより、第1テーパ部23が小型化できるため、室外機100の小型化を実現できる。特に、この実施の形態の場合、第1中間領域33c1の第3稜線23c3の長さL1を短くすることにより、熱交換器1の第2部分1bと軸流ファン3との間のスペースを狭めることができる。
Further, in this embodiment, the length L1 of the third ridge line 23c3 forming the first intermediate region 33c1 can be made different from the length L2 of the third ridge line 23c3 of the second intermediate region 33c2. For example, the length L1 of the third ridge line 23c3 forming the first intermediate region 33c1 can be formed to be shorter than the length L2 of the third ridge line 23c3 forming the second intermediate region 33c2. The first tapered portion 23 can be miniaturized by making the length L1 of the third ridge line 23c3 forming the first intermediate region 33c1 shorter than the length L2 forming the third ridge line 23c3 of the second intermediate region 33c2. Therefore, the outdoor unit 100 can be downsized. In particular, in the case of this embodiment, the space between the second portion 1b of the heat exchanger 1 and the axial flow fan 3 is narrowed by shortening the length L1 of the third ridge line 23c3 of the first intermediate region 33c1. be able to.
また、第1上流側領域33a1及び第1下流側領域33b1の形状及び大きさを維持した状態で、第1中間領域33c1の第3稜線23c3の長さL1を短くすることにより、第1テーパ部23の径方向の幅を低減できる。したがって、熱交換器1とベルマウス20との間の間隙が狭い場合であっても、送風性能の悪化の抑制とベルマウス20の小型化とを図ることができる。
Further, by shortening the length L1 of the third ridge line 23c3 of the first intermediate region 33c1 while maintaining the shape and size of the first upstream side region 33a1 and the first downstream side region 33b1, the first tapered portion The radial width of 23 can be reduced. Therefore, even when the gap between the heat exchanger 1 and the bell mouth 20 is narrow, it is possible to suppress the deterioration of the ventilation performance and to reduce the size of the bell mouth 20.
なお、この実施の形態においては、連結部23cを省略し、室外機100の小型化を実現することも可能である。
In this embodiment, it is also possible to omit the connecting portion 23c and realize the miniaturization of the outdoor unit 100.
また、軸AXの方向に沿った第1テーパ部23の第1上流側領域33a1の長さH1aは、軸AXの方向に沿った第1テーパ部23の第2上流側領域33a2の長さH1bと異ならせることができる。長さH1aを長さH1bと異なる値にすることにより、熱交換器1とベルマウス20との間の間隙が狭い場合であっても、空気の主流方向におけるベルマウス20の寸法をフレキシブルに設計できるため、ベルマウス20の小型化を図ることができる。
Further, the length H1a of the first upstream side region 33a1 of the first tapered portion 23 along the direction of the axis AX is the length H1b of the second upstream side region 33a2 of the first tapered portion 23 along the direction of the axis AX. Can be different from. By setting the length H1a to a value different from the length H1b, the dimensions of the bell mouth 20 in the mainstream direction of air can be flexibly designed even when the gap between the heat exchanger 1 and the bell mouth 20 is narrow. Therefore, the bell mouth 20 can be miniaturized.
上述の実施の形態は、本開示の要旨を逸脱しない範囲において種々の変形が可能である。例えば、室外機100がチラーユニットであっても、上述の実施の形態が同様に適用できるし、空気調和装置が、室外機100と室内機を一体化したものであっても、上述の実施の形態が同様に適用できる。
The above-described embodiment can be modified in various ways without departing from the gist of the present disclosure. For example, even if the outdoor unit 100 is a chiller unit, the above-described embodiment can be similarly applied, and even if the air conditioner integrates the outdoor unit 100 and the indoor unit, the above-described embodiment is carried out. The morphology is applicable as well.
1 熱交換器、1a 第1部分、1b 第2部分、3 軸流ファン、3a 翼、3b ハブ、3c 軸、3d モータ、5 圧縮機、10 筐体、10a 開口、10b グリル、15 仕切板、15a 送風機室、15b 機械室、20 ベルマウス、20a 流入口、20b 第1断面、20c 第2断面、21 直管部、21a 端部、21b 端部、23 第1テーパ部、23a 第1屈曲部、23a1 端部、23a2 端部、23a3 第1稜線、23b 第2屈曲部、23b1 端部、23b2 端部、23b3 第2稜線、23c 連結部、23c1 端部、23c2 端部、23c3 第3稜線、25 第2テーパ部、25a 端部、25b 端部、33a1 第1上流側領域、33a2 第2上流側領域、33b1 第1下流側領域、33b2 第2下流側領域、33c1 第1中間領域、33c2 第2中間領域、100 室外機。
1 heat exchanger, 1a 1st part, 1b 2nd part, 3 axial flow fan, 3a wing, 3b hub, 3c axis, 3d motor, 5 compressor, 10 housing, 10a opening, 10b grill, 15 partition plate, 15a blower room, 15b machine room, 20 bell mouth, 20a inlet, 20b first cross section, 20c second cross section, 21 straight pipe part, 21a end, 21b end, 23 first taper part, 23a first bend part. , 23a1 end, 23a2 end, 23a3 first ridge, 23b second bend, 23b1 end, 23b2 end, 23b3 second ridge, 23c connecting part, 23c1 end, 23c2 end, 23c3 third ridge, 25 2nd tapered part, 25a end part, 25b end part, 33a1 1st upstream side area, 33a2 2nd upstream side area, 33b1 1st downstream side area, 33b2 2nd downstream side area, 33c1 1st intermediate area, 33c2 1st 2 intermediate area, 100 outdoor units.
Claims (18)
- 熱交換器と、
前記熱交換器に誘引される空気の流れを生成する軸流ファンと、
前記空気が通過する開口を有し、前記熱交換器を収容し、前記開口と前記熱交換器との間に前記軸流ファンを収容する筐体と、
前記筐体の内部において、前記軸流ファンの周囲に設けられ、前記空気を前記開口に誘導する環状のベルマウスと
を備え、
前記ベルマウスは、
前記空気が流入する上流側の内径が、下流側の内径より大きい第1テーパ部と、
前記第1テーパ部から下流側に直線状に延びる直管部と
を有しており、
前記第1テーパ部は、
前記空気の流入口を形成する第1屈曲部と、
前記直管部と連なり、前記第1屈曲部よりも内径が小さい第2屈曲部と
前記第1屈曲部と前記第2屈曲部とに連なり、内面が直線状に延びた連結部と
を有しており、
前記直管部の軸の方向に沿った少なくとも一部の前記第1テーパ部の長さは、前記軸の方向に沿った前記直管部の長さよりも長い
空気調和装置の室外機。 With a heat exchanger,
An axial fan that produces an air flow attracted to the heat exchanger,
A housing having an opening through which the air passes, accommodating the heat exchanger, and accommodating the axial fan between the opening and the heat exchanger.
Inside the housing, an annular bell mouth provided around the axial flow fan to guide the air to the opening is provided.
The bell mouth
The first tapered portion whose inner diameter on the upstream side into which the air flows is larger than the inner diameter on the downstream side,
It has a straight pipe portion that extends linearly to the downstream side from the first tapered portion.
The first taper portion is
The first bent portion forming the air inlet and the like.
It has a second bent portion that is connected to the straight pipe portion and has an inner diameter smaller than that of the first bent portion, and is connected to the first bent portion and the second bent portion, and has a connecting portion whose inner surface extends linearly. And
An outdoor unit of an air conditioner in which the length of at least a part of the first tapered portion along the direction of the axis of the straight pipe portion is longer than the length of the straight pipe portion along the direction of the axis. - 前記第1屈曲部の第1曲率半径は、前記第2屈曲部の第2曲率半径よりも大きい
請求項1に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to claim 1, wherein the first radius of curvature of the first bent portion is larger than the second radius of curvature of the second bent portion. - 前記第1屈曲部の前記第1曲率半径又は前記第2屈曲部の前記第2曲率半径は、前記ベルマウスの周方向に変化する
請求項2に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to claim 2, wherein the first radius of curvature of the first bent portion or the second radius of curvature of the second bent portion changes in the circumferential direction of the bell mouth. - 直線状に延びた前記連結部の内面の長さは、前記ベルマウスの周方向に変化する
請求項1~3のいずれか一項に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to any one of claims 1 to 3, wherein the length of the inner surface of the connecting portion extending in a straight line changes in the circumferential direction of the bell mouth. - 前記第1屈曲部の第1中心角は、前記ベルマウスの周方向に変化する
請求項1~4のいずれか一項に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to any one of claims 1 to 4, wherein the first central angle of the first bent portion is changed in the circumferential direction of the bell mouth. - 前記第2屈曲部の第2中心角は、前記ベルマウスの周方向に変化する
請求項1~5のいずれか一項に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to any one of claims 1 to 5, wherein the second central angle of the second bent portion changes in the circumferential direction of the bell mouth. - 前記熱交換器は、上面視においてL字形状に形成されており、
前記軸流ファンの軸方向と交差する方向に延びる第1部分と、
前記第1部分と交差する方向に延び、前記第1テーパ部と間隔をあけて配置された第2部分とを有し、
前記第1屈曲部の内面は、第1上流側領域と第2上流側領域とからなり、
前記第1上流側領域及び前記第2上流側領域は、前記空気が流入する上流側から下流側に延びる第1稜線により形成されており、
前記第1上流側領域を形成する前記第1稜線は、前記ベルマウスの内側に向けて膨らんでおり、
前記第1上流側領域を形成する前記第1稜線の延長線上には、前記第2部分が配置されており、
前記第2上流側領域を形成する前記第1稜線の延長線上には、前記第2部分が配置されておらず、
前記第2屈曲部の内面は、第1下流側領域と第2下流側領域とからなり、
前記第1下流側領域及び前記第2下流側領域は、前記ベルマウスの内側に向けて膨らんだ第2稜線により形成されており、
前記第1下流側領域を形成する前記第2稜線は、前記第1上流側領域の前記第1稜線の延長線上に配置されており、
前記第2下流側領域を形成する前記第2稜線は、前記第2上流側領域の前記第1稜線の延長線上に配置されている
請求項1に記載の空気調和装置の室外機。 The heat exchanger is formed in an L shape when viewed from above.
A first portion extending in a direction intersecting the axial direction of the axial fan,
It has a second portion that extends in a direction intersecting the first portion and is spaced apart from the first tapered portion.
The inner surface of the first bent portion is composed of a first upstream side region and a second upstream side region.
The first upstream side region and the second upstream side region are formed by a first ridge line extending from the upstream side to the downstream side where the air flows in.
The first ridge line forming the first upstream region bulges toward the inside of the bell mouth.
The second portion is arranged on an extension of the first ridge line forming the first upstream region.
The second portion is not arranged on the extension of the first ridge line forming the second upstream region.
The inner surface of the second bent portion is composed of a first downstream side region and a second downstream side region.
The first downstream side region and the second downstream side region are formed by a second ridge line that bulges toward the inside of the bell mouth.
The second ridge line forming the first downstream side region is arranged on an extension of the first ridge line of the first upstream side region.
The outdoor unit of the air conditioner according to claim 1, wherein the second ridge line forming the second downstream side region is arranged on an extension line of the first ridge line of the second upstream side region. - 前記第1稜線の第1曲率半径は、前記第2稜線の第2曲率半径よりも大きい
請求項7に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to claim 7, wherein the first radius of curvature of the first ridgeline is larger than the second radius of curvature of the second ridgeline. - 前記第1上流側領域を形成する前記第1稜線の第1中心角は、前記第2上流側領域の前記第1稜線の第1中心角と異なる
請求項8に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to claim 8, wherein the first central angle of the first ridge line forming the first upstream side region is different from the first central angle of the first ridge line of the second upstream side region. .. - 前記第1上流側領域を形成する前記第1稜線の第1中心角は、前記第2上流側領域の前記第1稜線の第1中心角よりも小さい
請求項9に記載の空気調和装置の室外機。 The outdoor of the air conditioner according to claim 9, wherein the first central angle of the first ridge line forming the first upstream side region is smaller than the first central angle of the first ridge line of the second upstream side region. Machine. - 前記第1上流側領域を形成する前記第1稜線の第1曲率半径は、前記第2上流側領域の前記第1稜線の第1曲率半径と異なる
請求項7~10のいずれか一項に記載の空気調和装置の室外機。 The first aspect of the radius of curvature of the first ridge line forming the first upstream region is according to any one of claims 7 to 10, which is different from the first radius of curvature of the first ridge of the second upstream region. Outdoor unit of air conditioner. - 前記第1下流側領域を形成する前記第2稜線の第2中心角は、前記第2下流側領域の前記第2稜線の第2中心角と異なる
請求項7~11のいずれか一項に記載の空気調和装置の室外機。 The second central angle of the second ridge line forming the first downstream side region is according to any one of claims 7 to 11, which is different from the second central angle of the second ridge line of the second downstream side region. Outdoor unit of air conditioner. - 前記第1下流側領域を形成する前記第2稜線の第2曲率半径は、前記第2下流側領域の前記第2稜線の第2曲率半径と異なる
請求項7~12のいずれか一項に記載の空気調和装置の室外機。 The second radius of curvature of the second ridge line forming the first downstream side region is described in any one of claims 7 to 12, which is different from the second radius of curvature of the second ridge line of the second downstream side region. Outdoor unit of air conditioner. - 前記連結部の内面は、第1中間領域と第2中間領域とからなり、
前記第1中間領域及び前記第2中間領域は、直線状の第3稜線により形成されており、
前記第1中間領域を形成する前記第3稜線は、前記第1上流側領域の前記第1稜線と前記第1下流側領域を形成する前記第2稜線との間につながっており、
前記第2中間領域を形成する前記第3稜線は、前記第2上流側領域の前記第1稜線と前記第2下流側領域の前記第2稜線との間につながっており、
前記第1中間領域を形成する前記第3稜線の長さは、前記第2中間領域を形成する前記第3稜線の長さと異なる
請求項7~13のいずれか一項に記載の空気調和装置の室外機。 The inner surface of the connecting portion is composed of a first intermediate region and a second intermediate region.
The first intermediate region and the second intermediate region are formed by a linear third ridgeline.
The third ridge line forming the first intermediate region is connected between the first ridge line of the first upstream side region and the second ridge line forming the first downstream side region.
The third ridge line forming the second intermediate region is connected between the first ridge line of the second upstream side region and the second ridge line of the second downstream side region.
The air conditioner according to any one of claims 7 to 13, wherein the length of the third ridge line forming the first intermediate region is different from the length of the third ridge line forming the second intermediate region. Outdoor unit. - 前記第1中間領域を形成する前記第3稜線の長さは、前記第2中間領域を形成する前記第3稜線の長さよりも短い
請求項14に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to claim 14, wherein the length of the third ridge line forming the first intermediate region is shorter than the length of the third ridge line forming the second intermediate region. - 前記直管部の軸の方向に沿った前記第1テーパ部の長さは、周方向に変化する
請求項1~15のいずれか一項に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to any one of claims 1 to 15, wherein the length of the first tapered portion along the direction of the axis of the straight pipe portion changes in the circumferential direction. - 前記ベルマウスは、前記直管部と前記筐体の前記開口とに連なり、上流側の前記直管部から下流側の前記開口に向けて内径が大きくなる第2テーパ部を有している
請求項1~16のいずれか一項に記載の空気調和装置の室外機。 The bell mouth has a second tapered portion which is connected to the straight pipe portion and the opening of the housing and whose inner diameter increases from the straight pipe portion on the upstream side to the opening on the downstream side. The outdoor unit of the air conditioner according to any one of Items 1 to 16. - 前記第2テーパ部の下流側の端部の第2開口径は、前記第1テーパ部の上流側の端部の第1開口径よりも大きい
請求項17に記載の空気調和装置の室外機。 The outdoor unit of the air conditioner according to claim 17, wherein the second opening diameter of the downstream end portion of the second tapered portion is larger than the first opening diameter of the upstream end portion of the first tapered portion.
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US17/918,350 US20230142460A1 (en) | 2020-06-12 | 2020-06-12 | Outdoor unit for air-conditioning apparatus |
JP2022529988A JPWO2021250889A1 (en) | 2020-06-12 | 2020-06-12 | |
EP20939687.8A EP4166859A4 (en) | 2020-06-12 | 2020-06-12 | Outdoor unit of air conditioning device |
PCT/JP2020/023211 WO2021250889A1 (en) | 2020-06-12 | 2020-06-12 | Outdoor unit of air conditioning device |
CN202080101764.3A CN115698594A (en) | 2020-06-12 | 2020-06-12 | Outdoor unit of air conditioner |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115264599A (en) * | 2022-08-04 | 2022-11-01 | 珠海格力电器股份有限公司 | Guiding device, fan and air conditioner |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6277735U (en) * | 1985-11-01 | 1987-05-18 | ||
WO2009113338A1 (en) * | 2008-03-11 | 2009-09-17 | 三菱電機株式会社 | Air conditioner |
JP2010112204A (en) * | 2008-11-04 | 2010-05-20 | Mitsubishi Electric Corp | Air blower and heat pump device using this air blower |
JP2010236372A (en) * | 2009-03-30 | 2010-10-21 | Daikin Ind Ltd | Axial blower, air conditioner, and ventilation fan |
JP2013096622A (en) | 2011-10-31 | 2013-05-20 | Daikin Industries Ltd | Outdoor unit of air conditioner |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017077576A1 (en) * | 2015-11-02 | 2017-05-11 | 三菱電機株式会社 | Air conditioner outdoor unit and refrigeration cycle device |
WO2021084605A1 (en) * | 2019-10-29 | 2021-05-06 | 三菱電機株式会社 | Outdoor unit for air conditioning device |
-
2020
- 2020-06-12 EP EP20939687.8A patent/EP4166859A4/en active Pending
- 2020-06-12 US US17/918,350 patent/US20230142460A1/en active Pending
- 2020-06-12 CN CN202080101764.3A patent/CN115698594A/en active Pending
- 2020-06-12 WO PCT/JP2020/023211 patent/WO2021250889A1/en unknown
- 2020-06-12 JP JP2022529988A patent/JPWO2021250889A1/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6277735U (en) * | 1985-11-01 | 1987-05-18 | ||
WO2009113338A1 (en) * | 2008-03-11 | 2009-09-17 | 三菱電機株式会社 | Air conditioner |
JP2010112204A (en) * | 2008-11-04 | 2010-05-20 | Mitsubishi Electric Corp | Air blower and heat pump device using this air blower |
JP2010236372A (en) * | 2009-03-30 | 2010-10-21 | Daikin Ind Ltd | Axial blower, air conditioner, and ventilation fan |
JP2013096622A (en) | 2011-10-31 | 2013-05-20 | Daikin Industries Ltd | Outdoor unit of air conditioner |
Non-Patent Citations (1)
Title |
---|
See also references of EP4166859A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115264599A (en) * | 2022-08-04 | 2022-11-01 | 珠海格力电器股份有限公司 | Guiding device, fan and air conditioner |
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EP4166859A4 (en) | 2023-07-12 |
CN115698594A (en) | 2023-02-03 |
EP4166859A1 (en) | 2023-04-19 |
US20230142460A1 (en) | 2023-05-11 |
JPWO2021250889A1 (en) | 2021-12-16 |
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