WO2021250889A1 - Unité extérieure de dispositif de climatisation - Google Patents

Unité extérieure de dispositif de climatisation Download PDF

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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
Application number
PCT/JP2020/023211
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English (en)
Japanese (ja)
Inventor
奈穂 安達
敬英 田所
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN202080101764.3A priority Critical patent/CN115698594A/zh
Priority to EP20939687.8A priority patent/EP4166859A4/fr
Priority to JP2022529988A priority patent/JPWO2021250889A1/ja
Priority to PCT/JP2020/023211 priority patent/WO2021250889A1/fr
Priority to US17/918,350 priority patent/US20230142460A1/en
Publication of WO2021250889A1 publication Critical patent/WO2021250889A1/fr

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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
    • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne une unité extérieure d'un dispositif de climatisation, ladite unité extérieure étant dotée d'une embouchure en cloche ayant une première partie effilée dans laquelle le diamètre intérieur du côté amont par rapport à l'entrée d'air, est supérieur au diamètre intérieur du côté aval, et une partie de tuyau droit s'étendant en aval dans une ligne droite à partir de la première partie effilée. La première partie effilée comporte une première partie de courbure formant un orifice d'entrée d'air, une seconde partie de courbure qui est continue avec la partie de tuyau droit et qui a un diamètre intérieur inférieur à celui de la première partie de courbure, et une partie de liaison continue avec la première partie de courbure et la seconde partie de courbure, la surface interne de la partie de liaison s'étendant dans une ligne droite. La longueur d'au moins une partie de la première partie effilée dans la direction de l'axe de la partie de ligne droite est supérieure à la longueur de la partie de tube droit dans la direction de l'axe.
PCT/JP2020/023211 2020-06-12 2020-06-12 Unité extérieure de dispositif de climatisation WO2021250889A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202080101764.3A CN115698594A (zh) 2020-06-12 2020-06-12 空调装置的室外机
EP20939687.8A EP4166859A4 (fr) 2020-06-12 2020-06-12 Unité extérieure de dispositif de climatisation
JP2022529988A JPWO2021250889A1 (fr) 2020-06-12 2020-06-12
PCT/JP2020/023211 WO2021250889A1 (fr) 2020-06-12 2020-06-12 Unité extérieure de dispositif de climatisation
US17/918,350 US20230142460A1 (en) 2020-06-12 2020-06-12 Outdoor unit for air-conditioning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/023211 WO2021250889A1 (fr) 2020-06-12 2020-06-12 Unité extérieure de dispositif de climatisation

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EP (1) EP4166859A4 (fr)
JP (1) JPWO2021250889A1 (fr)
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WO (1) WO2021250889A1 (fr)

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CN115264599A (zh) * 2022-08-04 2022-11-01 珠海格力电器股份有限公司 一种导流装置、风机及空调器

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JPS6277735U (fr) * 1985-11-01 1987-05-18
WO2009113338A1 (fr) * 2008-03-11 2009-09-17 三菱電機株式会社 Climatiseur
JP2010112204A (ja) * 2008-11-04 2010-05-20 Mitsubishi Electric Corp 送風機及びこの送風機を用いたヒートポンプ装置
JP2010236372A (ja) * 2009-03-30 2010-10-21 Daikin Ind Ltd 軸流送風機、空気調和機及び換気扇
JP2013096622A (ja) 2011-10-31 2013-05-20 Daikin Industries Ltd 空気調和装置の室外ユニット

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US10495328B2 (en) * 2015-11-02 2019-12-03 Mitsubishi Electric Corporation Outdoor unit of air conditioner and refrigeration cycle device
WO2021084605A1 (fr) * 2019-10-29 2021-05-06 三菱電機株式会社 Unité extérieure pour dispositif de climatisation

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Publication number Priority date Publication date Assignee Title
JPS6277735U (fr) * 1985-11-01 1987-05-18
WO2009113338A1 (fr) * 2008-03-11 2009-09-17 三菱電機株式会社 Climatiseur
JP2010112204A (ja) * 2008-11-04 2010-05-20 Mitsubishi Electric Corp 送風機及びこの送風機を用いたヒートポンプ装置
JP2010236372A (ja) * 2009-03-30 2010-10-21 Daikin Ind Ltd 軸流送風機、空気調和機及び換気扇
JP2013096622A (ja) 2011-10-31 2013-05-20 Daikin Industries Ltd 空気調和装置の室外ユニット

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Publication number Priority date Publication date Assignee Title
CN115264599A (zh) * 2022-08-04 2022-11-01 珠海格力电器股份有限公司 一种导流装置、风机及空调器

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EP4166859A4 (fr) 2023-07-12
US20230142460A1 (en) 2023-05-11
EP4166859A1 (fr) 2023-04-19
CN115698594A (zh) 2023-02-03
JPWO2021250889A1 (fr) 2021-12-16

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