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WO2014050365A1 - Climatiseur - Google Patents

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Publication number
WO2014050365A1
WO2014050365A1 PCT/JP2013/072148 JP2013072148W WO2014050365A1 WO 2014050365 A1 WO2014050365 A1 WO 2014050365A1 JP 2013072148 W JP2013072148 W JP 2013072148W WO 2014050365 A1 WO2014050365 A1 WO 2014050365A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
portions
axial direction
air conditioner
height
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2013/072148
Other languages
English (en)
Japanese (ja)
Inventor
全史 宇多
中井　聡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to EP13841557.5A priority Critical patent/EP2902632B1/fr
Priority to CN201380050381.8A priority patent/CN104662303B/zh
Priority to ES13841557.5T priority patent/ES2622007T3/es
Publication of WO2014050365A1 publication Critical patent/WO2014050365A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422—Discharge tongues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0025—Cross-flow or tangential fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the present invention relates to an air conditioner equipped with a cross flow fan.
  • the crossflow fan is a blower having a plurality of blades extending in the axial direction and arranged in the rotational direction.
  • a front tongue portion (stabilizer) and a rear tongue portion (rear guider) are arranged on both sides of the outer peripheral portion of the fan. These tongue portions constitute a ventilation path on the blowing side of the fan.
  • the tongue is closest to the fan at or near the tip. A vortex is generated between the tip of the tongue and the fan, and when the fan blades pass through the vortex, the vortex airflow and the blades interfere with each other to generate wind noise (NZ sound). Will occur.
  • a plurality of step portions are provided at the front end of the front tongue (stabilizer), and the height of the front end is changed with respect to the axial direction.
  • the front tongue is closest to the fan at the tip.
  • Each step portion extends in a direction orthogonal to the axial direction, and the tip of the portion between the step portions is shifted around the rotation axis.
  • a step is formed at the front end of the front tongue portion, so that the vortex airflow is bent near the step portion and the flow is unstable.
  • the wind speed distribution on the blow-out side of the crossflow fan is such that the wind speed increases toward the center in the axial direction of the fan. Therefore, as shown in FIG. 21, among the plurality of step portions of the front tongue portion 91, in the vicinity of the step portion 91a whose height decreases toward the axial central portion of the fan 90, the air flow is directed to the step portion 91a. In this way, the direction changes, and the vehicle goes over the stepped portion 91a. As a result, the air flow is concentrated and flows into the bent portion of the vortex air current, and the vortex air current is disturbed, so that wind noise increases. The same problem occurs when a step is provided at the tip of the rear tongue.
  • an object of the present invention is to provide an air conditioner that can suppress turbulence of a vortex and reduce wind noise.
  • An air conditioner includes a cross flow fan, and a stabilizer and a rear guider that are arranged on both sides of an outer peripheral portion of the cross flow fan to form a ventilation path, and at least the stabilizer and the rear guider are provided.
  • a plurality of stepped portions including a plurality of first stepped portions whose height decreases in the axial direction toward the fan central portion in the axial direction are formed side by side in the axial direction.
  • a bulging portion is formed in the vicinity of at least one of the plurality of first step portions on the opposite surface.
  • At least one of the stabilizer and the rear guider has a bulging portion that bulges on the opposite side of the fan in the vicinity of the first step portion whose height decreases toward the fan central portion.
  • the air flow sucked into the fan is difficult to get over the bulge. Therefore, it is possible to suppress the air flow from concentrating into the bent portion of the vortex airflow generated between the first step portion and the fan, and to suppress the turbulence of the vortex airflow. As a result, wind noise can be reduced.
  • the timing at which the fan blades pass through both sides in the axial direction of the step is shifted, and the height of the portion between the steps is adjusted.
  • the timing at which the blades pass through the portion between the stepped portions can be shifted by continuously changing the direction. Thereby, since the timing which a wind noise generate
  • the air conditioner according to a second invention is characterized in that, in the first invention, the bulging portion is formed along the first stepped portion.
  • the bulging portion is formed along the first stepped portion, the air flow sucked into the fan can be prevented from getting over the first stepped portion. Therefore, it can suppress more reliably that an air flow concentrates and flows into the bending part of a vortex
  • the air conditioner according to a third aspect of the present invention is the air conditioner according to the first or second aspect, wherein the bulging portion is the first stepped portion that is farthest in the axial direction from the center of the fan among the plurality of first stepped portions. It is provided in the vicinity of.
  • the bulging portion is formed in the vicinity of the first step portion farthest from the central portion of the fan in the axial direction.
  • An air conditioner according to a fourth aspect of the present invention is the air conditioner according to any one of the first to third aspects, wherein at least one of the stabilizer and the rear guider has two or more bulging portions, and the two The bulging part described above is characterized in that the bulging part is higher in the bulging part farther away from the fan center part in the axial direction.
  • the air flow sucked into the crossflow fan tends to converge at the central portion of the fan in the axial direction, so that the bulging portion farther from the central portion of the fan in the axial direction increases the bulging height.
  • the turbulence of the vortex airflow can be more reliably suppressed.
  • An air conditioner according to a fifth aspect of the present invention is the air conditioner according to any one of the first to fourth aspects, wherein the first stepped portion extends linearly or curvedly from the highest position to the lowest position.
  • the first stepped portion extends linearly or curvedly over the entire axial direction, the first stepped portion is easily formed.
  • An air conditioner according to a sixth invention is characterized in that, in any one of the first to fourth inventions, the height of the first step portion is changed stepwise.
  • the inclination of the first step portion can be adjusted regardless of the axial length of the first step portion.
  • An air conditioner according to a seventh invention is the air conditioner according to any one of the first to sixth inventions, wherein the other first step portion is arranged adjacent to the first step portion, and the two adjacent step portions are arranged.
  • step-difference part is changing continuously regarding the axial direction.
  • the height of the portion between the step portions changes continuously with respect to the axial direction, so the timing at which the fan blades pass through the portion between the step portions can be shifted. Therefore, when a blade
  • An air conditioner according to an eighth aspect of the present invention is the air conditioner according to any one of the first to sixth aspects, wherein the stepped portion adjacent to the first stepped portion has a height that increases toward the center of the fan in the axial direction. It is arrange
  • step-difference parts is constant regarding an axial direction, It is characterized by the above-mentioned.
  • At least one of the stabilizer and the rear guider is easy to form a stabilizer or a rear guider because the height of the portion between the step portions is constant in the axial direction.
  • An air conditioner according to a ninth invention is the air conditioner according to any one of the first to eighth inventions, wherein the plurality of stepped portions have a plurality of second stepped portions whose heights increase toward the fan central portion in the axial direction. And at least one of the stabilizer and the rear guider is characterized in that a bulging portion is not formed in the vicinity of the second step portion on the surface opposite to the cross flow fan.
  • the height of the second stepped portion increases toward the fan central portion, the direction of the air flow sucked into the fan does not change so as to go to the second stepped portion. . Therefore, it is not necessary to provide a bulging part in the vicinity of the second step part.
  • the bulging part is provided in the vicinity of all the stepped parts, the ventilation resistance is increased and the blowing performance may be deteriorated.
  • the bulging part is not provided in the vicinity of the second stepped part. Therefore, it is possible to prevent a decrease in the blowing performance.
  • At least one of the stabilizer and the rear guider has a bulging portion that bulges on the opposite side of the fan in the vicinity of the first step portion whose height decreases toward the fan central portion.
  • the air flow sucked into the fan is difficult to get over the bulge. Therefore, it is possible to suppress the air flow from concentrating into the bent portion of the vortex airflow generated between the first step portion and the fan, and to suppress the turbulence of the vortex airflow. As a result, wind noise can be reduced.
  • the timing at which the fan blades pass through both sides in the axial direction of the step is shifted, and the height of the portion between the steps is adjusted. The timing at which the blades pass through the portion between the stepped portions can be shifted by continuously changing the direction. Thereby, since the timing which a wind noise generate
  • the bulging portion is formed along the first step portion, it is possible to suppress the air flow sucked into the fan from getting over the first step portion. Therefore, it can suppress more reliably that an air flow concentrates and flows into the bending part of a vortex
  • the air flow sucked into the cross flow fan tends to converge at the central portion of the fan in the axial direction, so that the bulging portion is formed in the vicinity of the first step portion that is farthest from the axial central portion of the fan.
  • the air flow sucked into the cross flow fan tends to converge at the central portion of the fan in the axial direction, so that the bulging portion farther from the central portion in the axial direction of the fan increases the bulging height.
  • the turbulence of the vortex airflow can be more reliably suppressed.
  • the first stepped portion extends linearly or curvedly over the entire axial direction, the first stepped portion is easily formed.
  • the inclination of the first step portion can be adjusted regardless of the axial length of the first step portion.
  • the timing at which the fan blades pass through the portion between the step portions can be shifted. Therefore, when a blade
  • At least one of the stabilizer and the rear guider is easy to form the stabilizer or the rear guider because the height of the portion between the step portions is constant in the axial direction.
  • the height of the second stepped portion increases toward the fan central portion, the direction of the air flow sucked into the fan does not change so as to go to the second stepped portion. . Therefore, it is not necessary to provide a bulging part in the vicinity of the second step part.
  • the bulging part is provided in the vicinity of all the stepped parts, the ventilation resistance is increased and the blowing performance may be deteriorated.
  • the bulging part is not provided in the vicinity of the second stepped part. Therefore, it is possible to prevent a decrease in the blowing performance.
  • FIG. 6 It is an external appearance perspective view of the indoor unit of the air conditioner which concerns on embodiment of this invention. It is sectional drawing of an indoor unit. It is a perspective view of a cross flow fan. It is a partial expansion perspective view of a cross flow fan. It is a perspective view near a cross flow fan in an indoor unit. It is the figure which looked at the cross flow fan vicinity in an indoor unit from the front. It is the figure which looked at the cross flow fan vicinity in an indoor unit from upper direction. (A) is a partially enlarged view of the vicinity of the tip of the rear guider taken along the line AA in FIGS. 6 and 7, and (b) is a cross section taken along the line BB in FIGS. 6 and 7.
  • (A) is a partially enlarged view of the vicinity of the tip of the rear guider taken along the line CC of FIGS. 6 and 7, and (b) is a cross section taken along the line DD of FIGS. It is the elements on larger scale near the front-end
  • (A) is a partially enlarged view of the vicinity of the stabilizer in the cross-sectional view taken along the line AA in FIGS. 6 and 7, and (b) is a cross-sectional view taken along the line BB in FIGS. It is the elements on larger scale near a stabilizer.
  • FIG. 1 It is a perspective view of the front-end
  • the indoor unit 1 of the air conditioner of this embodiment has an elongated shape in one direction as a whole, and is installed on the wall surface of the room so that the longitudinal direction is horizontal.
  • the indoor unit 1 constitutes an air conditioner together with an outdoor unit (not shown), and performs indoor air conditioning.
  • front the direction protruding from the wall to which the indoor unit 1 is attached
  • rear the opposite direction
  • the indoor unit 1 includes a casing 2 and internal devices such as a heat exchanger 3, a cross flow fan 10, a filter 4, and an electrical component box (not shown) housed in the casing 2. Yes.
  • a suction port 2 a is formed on the upper surface of the casing 2
  • an air outlet 2 b is formed on the lower surface of the casing 2.
  • a horizontal flap 5 for adjusting the wind direction in the vertical direction and opening and closing the air outlet 2b is disposed.
  • the cross flow fan 10 (hereinafter simply referred to as the fan 10) is arranged such that its axial direction is along the left-right direction, and rotates in the direction indicated by the arrow in FIG.
  • a front guider 30 and a rear guider (rear tongue) 20 that form a ventilation path are disposed on both front and rear sides of the fan 10.
  • the upper half of the front guider 30 is composed of a stabilizer (front tongue) 32.
  • the fan 10 sucks air from the upper front and blows out the lower rear.
  • the heat exchanger 3 is disposed so as to surround the front and the upper side of the fan 10.
  • the indoor air is sucked from the suction port 2a by driving the fan 10, and the sucked air is heated or cooled in the heat exchanger 3 and then blown out from the air outlet 2b.
  • the fan 10 includes a plurality (six in this embodiment) of impellers 12 arranged in the axial direction (left and right direction) and an end plate 11.
  • the end plate 11 constitutes the right end portion of the fan 10, and a boss portion 11 a connected to a rotating shaft of a motor (not shown) that drives the fan 10 projects from the center portion of the right surface of the end plate 11. Has been.
  • the right five impellers 12A among the six impellers 12 include a plurality of blades 15 arranged in the circumferential direction and a substantially annular support plate 13 connected to the left ends of the plurality of blades 15. 15 and the support plate 13 are integrally formed.
  • the right end of the blade 15 of the impeller 12A is joined to the adjacent end plate 11 or the support plate 13 of the impeller 12A by welding or the like.
  • the leftmost impeller 12B is composed of a plurality of blades 15 arranged in the circumferential direction and a substantially disc-shaped end plate 14 connected to the left end of the plurality of blades 15.
  • the blade 15 and the end plate 14 are integrally formed.
  • the right end of the blade 15 of the impeller 12B is joined to the support plate 13 of the adjacent impeller 12A by welding or the like.
  • a shaft (not shown) that is rotatably supported by a bearing (not shown) provided on the casing 2 projects from the center of the left surface of the end plate 14.
  • the plurality of blades 15 of the impeller 12 extend along the axial direction (left-right direction), and are arranged in a forward blade structure with a predetermined blade angle.
  • the axial lengths of the blades 15 of the five impellers 12A are all the same, and are almost twice the axial length of the blades 15 of the impeller 12B.
  • the plurality of blades 15 of the impeller 12 are arranged at unequal pitches in the circumferential direction.
  • the arrangement pitch of the blades 15 of the six impellers 12 is the same.
  • the plurality of blades 15 may be arranged at an equal pitch.
  • the plurality of blades 15 of the two adjacent impellers 12 are displaced in the circumferential direction. Specifically, the blade 15 is shifted from the blade 15 of the impeller 12 adjacent to the left side of the blade 15 by an angle ⁇ in the rotation direction (the arrow direction in FIG. 4). That is, each of the plurality of blades 15 of the six impellers 12 is shifted by an angle ⁇ in the rotation direction as it goes to the right.
  • the rear guider 20 is disposed behind the fan 10, and the lower end of the rear guider 20 is connected to the air outlet 2b (see FIG. 2).
  • the length of the rear guider 20 in the left-right direction is substantially the same as the length of the fan 10 in the left-right direction, and the rear guider 20 faces the fan 10 over substantially the entire left-right direction of the fan 10. ing.
  • the upper end of the rear guider 20 is located slightly higher than the upper end of the fan 10.
  • a portion of the surface of the rear guider 20 that faces the fan 10 except for the upper and lower end portions is configured by a substantially arc-shaped curved surface 21.
  • the separation distance (shortest distance) between the curved surface 21 and the outer peripheral portion of the fan 10 becomes smaller toward the upper side.
  • the rear guider 20 has a protruding portion 22 above (the tip side) from the curved surface 21.
  • the projecting portion 22 is formed in a substantially arc shape whose cross-sectional shape perpendicular to the left-right direction swells on the opposite side to the fan 10.
  • the separation distance (shortest distance) between the protrusion 22 and the outer peripheral portion of the fan 10 increases as it goes upward.
  • the rear guider 20 has a lower end of the protrusion 22 and an upper end of the curved surface 21. At the boundary 20a (hereinafter referred to as the closest position 20a).
  • the projecting portion 22 includes six twisted portions 23 arranged in the left-right direction, five connecting portions 24 respectively disposed between two adjacent twisted portions 23, and two inclination relaxations. It comprises a portion 25 and a plurality of rib portions 26 (see FIGS. 7 and 9).
  • the six twisted portions 23 are arranged opposite to the impeller 12 respectively.
  • the right and left lengths of the right five twisted portions 23 among the six twisted portions 23 are all the same and are substantially the same as the left and right lengths of the blades 15 of the impeller 12A.
  • the left-right direction length of the leftmost twisted part 23 is substantially the same as the left-right direction length of the blade 15 of the impeller 12B.
  • the twisted portion 23 has a substantially arc shape in cross section perpendicular to the left-right direction. As shown in FIG. 11, the twisted portion 23 has a shape that is continuously displaced in the circumferential direction of the fan 10 from the left end to the right end. Therefore, the cross-sectional shape orthogonal to the left-right direction of the twisted portion 23 is substantially constant. Further, the height of the tip (front upper end) of the twisted portion 23 continuously changes in the left-right direction.
  • the heights of the twisted portion 23, the connecting portion 24, the inclination relaxing portion 25, and step portions 28a to 28e described later are not the height in the vertical direction but the protruding direction of the protruding portion 22 (this embodiment) Then, it is the height of the upper front.
  • the six twisted portions 23 have the same height at the uppermost end and the same height at the lowermost end (see FIGS. 6 and 7).
  • the twisted portion 23 is shifted by an angle ⁇ 1 in the direction opposite to the rotation direction of the fan 10 (the arrow direction in FIG. 8) from the left end to the right end.
  • the deviation angles ⁇ 1 of the six twisted portions 23 are all the same.
  • the left end of the twisted portion 23 is rotated with respect to the right end of the twisted portion 23 adjacent to the left side of the twisted portion 23 (the arrow direction in FIG. 8). Is shifted by an angle ⁇ 1.
  • the angle ⁇ 1 is the same as the angle ⁇ 1.
  • the five connecting portions 24 connect the opposite left and right end portions of two adjacent twisted portions 23, respectively.
  • the connecting portion 24 has a substantially arc-shaped cross section perpendicular to the left-right direction, and the thickness thereof is substantially the same as that of the twisted portion 23.
  • the distal end (front upper end) of the connecting portion 24 extends linearly so that the height decreases toward the right.
  • Each of the five connecting portions 24 is disposed to face the support plate 13 of the fan 10 (see FIGS. 6 and 7).
  • the two inclination relaxing portions 25 are connected to the tips of the two connecting portions 24 on the left side of the five connecting portions 24, respectively.
  • the two inclination relaxation parts 25 have the same shape.
  • the inclination relaxing part 25 extends substantially forward from the front upper end of the connecting part 24 and the left end part of the twisted part 23 located on the right side of the connecting part 24.
  • the inclination relaxation part 25 has a substantially triangular shape when viewed from above, and the tip (front end) of the inclination relaxation part 25 extends substantially linearly, and the left end of the tip of the connecting part 24 and the tip of the twist part 23 are connected. It is connected. As shown in FIG.
  • the height of the tip (front end) of the inclination relaxation part 25 is lower toward the right.
  • the length in the left-right direction of the inclination relaxing portion 25 is preferably 5% to 30% of the total length of the twisted portion 23 and the connecting portion 24 in the left-right direction.
  • the cross-sectional shape orthogonal to the axial direction of the inclination relaxing part 25 is substantially triangular, and the rear surface of the inclination relaxing part 25 is substantially above the upper surface of the twisted part 23 or the connecting part 24.
  • the upper surface of the inclination relaxation part 25 extends substantially forward from the upper end of the rear surface of the inclination relaxation part 25.
  • the thickness of the front end of the inclination relaxing portion 25 is substantially the same as the thickness of the twisted portion 23 and the connecting portion 24.
  • the plurality of rib portions 26 extend rearward from the rear surface of the inclination relaxing portion 25. As shown in FIG. 9, the rib portion 26 protrudes from the rear surface (surface opposite to the fan 10) of the twisted portion 23 or the connecting portion 24.
  • the vertical height of the front end of the rib portion 26 and the vertical height of the upper end of the rear surface of the inclination relaxing portion 25 are substantially the same.
  • the thickness of the rib part 26 is so thin that it goes back.
  • the inclination relaxing part 25 and the rib part 26 bulge from the surrounding parts (twisted part 23 and connecting part 24).
  • This bulged portion is referred to as a bulged portion 27.
  • the range of the bulging portion 27 viewed from above coincides with the range in which the inclination relaxing portion 25 and the rib portion 26 are combined.
  • the height of the bulging portion 27 in the direction D (see FIG. 9) substantially orthogonal to the surface of the protruding portion 22 opposite to the fan 10 is defined as the bulging height.
  • the position 27 a (hereinafter referred to as the apex 27 a) where the bulge height of the bulge portion 27 is the highest is a position corresponding to the right end of the connecting portion 24 among the upper ends of the rear surfaces of the inclination relaxation portions 25.
  • the bulging height of the portion on the right side of the apex 27a of the bulging portion 27 is reduced toward the right, and the portion on the left side of the bulging portion 27 is directed to the left.
  • the bulging height has suddenly decreased.
  • step portions 28a to 28e are formed side by side in the left and right direction at the tip of the projection portion 22. .
  • the height of the step portions 28a to 28e decreases toward the right.
  • the step portions 28 a to 28 c are arranged on the left side of the axial center portion M (see FIGS. 6 and 7) of the fan 10, and the step portions 28 d and 28 e are arranged on the right side of the axial center portion M of the fan 10.
  • the step portions 28 a and 28 b are formed at the tip of the inclination relaxing portion 25, and the step portions 28 c to 28 e are formed at the tip of the connecting portion 24.
  • the height of the highest position (left end) of the five step portions 28a to 28e is the same.
  • the height of the lowest position (right end) of the stepped portions 28c to 28e formed at the tip of the connecting portion 24 is the same.
  • the height of the lowest position (right end) of the stepped portions 28a and 28b formed at the tip of the inclination relaxing portion 25 is the same, and is higher than the height of the lowest position of the stepped portions 28c to 28e.
  • the inclination angle of the step portions 28a and 28b with respect to the axial direction is defined as an angle ⁇ 1
  • the inclination angle of the step portions 28c to 28e with respect to the axial direction is defined as an angle ⁇ 2.
  • the angle ⁇ 1 is smaller than the angle ⁇ 2. That is, the stepped portions 28a and 28b are inclined more gently than the stepped portions 28c to 28e.
  • the amount of change in height in the left-right direction range of the predetermined length W from the highest position of the step portions 28a, 28b is ⁇ H1.
  • the amount of change in height in the left-right direction range of the predetermined length W from the highest position of the step portions 28c to 28e is assumed to be ⁇ H2.
  • the change amount ⁇ H1 is smaller than the change amount ⁇ H2.
  • the “amount of change in height in the left-right direction (axial direction) range of the predetermined length W” is an index for comparing the slopes of the stepped portions.
  • the length W is not limited to the length shown in FIG.
  • the length W should just be a value smaller than the left-right direction length of level
  • the base point of the range in the left-right direction with the length W is the highest position of the stepped portion, but the base point may not be the highest position of the stepped portion.
  • the front guider 30 is disposed in front of the fan 10, and the lower end of the front guider 30 is connected to the air outlet 2b (see FIG. 2).
  • the front guider 30 includes a stabilizer 32 that is disposed to face the fan 10 and a front wall portion 31 that extends from the lower end of the stabilizer 32 to the air outlet 2b.
  • the length of the stabilizer 32 in the left-right direction is substantially the same as the length of the fan 10 in the left-right direction, and the stabilizer 32 faces the fan 10 over substantially the entire left-right direction of the fan 10. ing. Further, as shown in FIGS. 2 and 6, the upper end of the stabilizer 32 is at a position lower than the center of the fan 10.
  • the portion of the surface of the stabilizer 32 that faces the fan 10, except for the upper and lower ends, is configured by a substantially arc-shaped curved surface 33.
  • the separation distance (shortest distance) between the curved surface 33 and the outer peripheral portion of the fan 10 becomes smaller toward the upper side.
  • the stabilizer 32 has a bent surface 34 that bends substantially forward from the lower end of the curved surface 33.
  • the lower end of the bent surface 34 is connected to the front wall portion 31.
  • the stabilizer 32 has a flat end surface 35 extending forward and downward from the upper end of the curved surface 33, and a convex portion 36 disposed in front of the end surface 35 and protruding upward from the end surface 35.
  • the convex portion 36 and the end surface 35 constitute the upper end portion of the rear guider 20.
  • the convex portion 36 has a substantially triangular cross-sectional shape perpendicular to the left-right direction. As shown in FIG. 14, the stabilizer 32 is closest to the outer peripheral portion of the fan 10 at the upper end 32 a of the curved surface 33 (hereinafter referred to as the closest position 32 a).
  • the stabilizer 32 (the convex portion 36, the end surface 35, the curved surface 33, and the bent surface 34) includes five twist portions 37 arranged in the left-right direction and five twist portions 37 disposed between two adjacent twist portions 37, respectively. It is comprised with the connection part 38.
  • FIG. 1 the convex portion 36, the end surface 35, the curved surface 33, and the bent surface 34.
  • the six twisted portions 37 are arranged to face the impeller 12 respectively.
  • the right and left lengths of the five twisted portions 37 are all the same, and are substantially the same as the length of the blade 15 of the impeller 12A in the left-right direction.
  • the left-right direction length of the leftmost twisted portion 37 is substantially the same as the left-right direction length of the blade 15 of the impeller 12B.
  • the twisted portion 37 has a shape that is continuously displaced in the circumferential direction of the fan 10 from the left end to the right end. Therefore, the cross-sectional shape orthogonal to the left-right direction of the twisted portion 37 is substantially constant. Further, the height of the tip (upper end) of the twisted portion 37 continuously changes in the left-right direction.
  • the six twisted portions 37 have the same height at the uppermost end and the same height at the lowermost end (see FIG. 6).
  • the twisted portion 37 is shifted by an angle ⁇ 2 in the direction opposite to the rotation direction of the fan 10 (the arrow direction in FIG. 10) from the left end to the right end.
  • the deviation angles ⁇ 2 of the six twisted portions 37 are all the same.
  • the left end of the twisted portion 37 is rotated with respect to the right end of the twisted portion 37 adjacent to the left side of the twisted portion 37 (the arrow direction in FIG. 10). Is shifted by an angle ⁇ 2.
  • the angle ⁇ 2 is the same as the angle ⁇ 2.
  • the five connecting portions 38 connect the opposite left and right end portions of the two adjacent twisted portions 37, respectively.
  • Each of the five connecting portions 38 is disposed to face the support plate 13 of the fan 10. Due to the difference in the heights of the opposing left and right end portions of the two adjacent twisted portions 37, five stepped portions are formed side by side in the left and right direction at the tip of the stabilizer 32.
  • a vortex air current (indicated by an arrow in FIG. 8B) is generated between the tip of the rear guider 20 and the fan 10.
  • the center C of the vortex air current is indicated by a one-dot chain line.
  • the vortex airflow is bent at portions between the axial ends of the step portions 28 a to 28 e and the fan 10.
  • the wind speed distribution on the blow-out side of the fan 10 is such that the wind speed increases toward the central portion in the axial direction of the fan 10, so that the air flow sucked into the fan 10 is Try to converge to the center M. For this reason, if the bulging portion 27 is not provided in the vicinity of the step portions 28a and 28b, the direction of air flow tends to change toward the step portions 28a and 28b. Will flow in a concentrated manner. As a result, the vortex airflow is disturbed, and as a result, wind noise increases.
  • a bulging portion 27 bulging on the opposite side of the fan 10 from the twisted portion and the connecting portion 24 is provided in the vicinity of the stepped portions 28a and 28b.
  • the direction of the air flow is less likely to change toward the step portions 28a and 28b, and the air flow passing through the range of the bulging portion 27 can be reduced. Therefore, since it can suppress that an air flow concentrates and flows into the bending part of a vortex
  • the inclination angle ⁇ 1 of the step portions 28a and 28b is smaller than the inclination angle ⁇ 2 of the other step portions 28c to 28e, the inclination angle of the step portions 28a and 28b is the same as the angle ⁇ 2.
  • the direction of the air flow is less likely to change toward the step portions 28a and 28b, and the air flow is concentrated and flows into the bent portion of the vortex air flow. It can be suppressed more.
  • the inclination angle of the stepped portions 28a and 28b is reduced, the bending angle of the bent portion of the vortex airflow becomes gentle, so that the vortex airflow is less likely to be disturbed.
  • a vortex airflow (indicated by an arrow in FIG. 8B) is also generated between the tip of the stabilizer 32 and the fan 10, and the vortex airflow and the blades are passed when the blades 15 pass through the vortex airflow.
  • Wind noise is generated by the interference of 15. Since the twisted portion 37 of the stabilizer 32 is continuously displaced in the circumferential direction with respect to the left-right direction, when the blade 15 passes through one twisted portion 37, wind noise is continuously displaced and generated.
  • the air conditioner of this embodiment has the following characteristics.
  • the rear guider 20 has a bulging portion 27 that bulges on the opposite side of the fan 10 in the vicinity of the step portions 28a and 28b whose height decreases toward the axial center portion M of the fan 10.
  • the air flow sucked into 10 is difficult to get over the bulging portion 27. Therefore, it is possible to suppress the air flow from being concentrated and flow into the bent portion of the vortex airflow generated between the step portions 28 a and 28 b and the fan 10, and the turbulence of the vortex airflow can be suppressed. As a result, wind noise can be reduced.
  • the portion between the step portions 28a to 28e is used as the blade 15. The timing of passing can be shifted. Therefore, when the blade 15 passes through the portion between the step portions 28a to 28e, the timing at which the wind noise is generated can be continuously shifted, so that the wind noise can be reduced.
  • the stepped portions (second stepped portions) 28d and 28e are increased in height toward the central portion M in the axial direction of the fan 10, the air flow sucked into the fan 10 flows into the stepped portions 28d and 28e. The direction does not change as it goes. Therefore, it is not necessary to provide a bulging portion in the vicinity of the step portions 28d and 28e.
  • the bulging portions are provided in the vicinity of all the step portions 28a to 28e, the ventilation resistance may increase and the air blowing performance may be deteriorated.
  • the bulging portions are adjacent to the step portions 28d and 28e. Since no exit portion is provided, it is possible to prevent a reduction in blowing performance.
  • the bulging portion 27 is provided in the vicinity of the step portion 28 a closest to the axial end portion of the fan 10.
  • the turbulence of the vortex can be more reliably suppressed.
  • the bulging part 27 is provided also in the vicinity of the level
  • the bulging portion is not provided in the vicinity of the step portion 28 c whose height decreases toward the axial center portion M of the fan 10, but the step portion 28 c is the central portion of the fan 10 in the axial direction. Since it is close to M, the direction of the airflow flowing in the vicinity of the stepped portion 28c is a direction substantially perpendicular to the axial direction, and the direction of the airflow hardly changes toward the stepped portion 28c. In the present embodiment, it is possible to suppress the deterioration of the blowing performance by not providing the bulging portion in the vicinity of the stepped portion 28c.
  • the bulging portion 27 is formed along the step portions 28a and 28b, it is possible to suppress the air flow sucked into the fan 10 from getting over the step portions 28a and 28b. Therefore, it can suppress more reliably that an air flow concentrates and flows into the bending part of a vortex
  • the step portions 28a and 28b are smaller in height change amount in the axial range of a predetermined length than the other step portions 28c to 28e. If the amount of change of the step portions 28a and 28b is the same as that of the step portions 28c to 28e, the direction of air flow tends to change toward the step portions 28a and 28b in the vicinity of the step portions 28a and 28b. However, in this embodiment, since the amount of change in the step portions 28a and 28b is small, the air flow sucked into the fan 10 is directed toward the step portions 28a and 28b. A change in direction can be suppressed. Therefore, it is possible to further suppress the air flow from being concentrated and flowing into the bent portion of the vortex airflow generated between the stepped portions 28 a and 28 b and the fan 10.
  • the two adjacent twisted portions 23 are connected by the connecting portion 24, but as shown in FIG. 16, the axial directions in which the two adjacent twisted portions 23 face each other without providing the connecting portion 24.
  • the ends may be directly connected.
  • the step portion (for example, the step portion 128e in FIG. 16) not provided with the inclination relaxing portion is the upper end portion in the axial direction of the opposing axial end portions of the two adjacent twisted portions 23. It is comprised by the front end side part, and is orthogonal to an axial direction.
  • the shape of the step portions 28a and 28b is not limited to the shape of the above embodiment.
  • it may extend in a curved line from the highest position to the lowest position.
  • it may be a shape whose height changes stepwise as shown in stepped portions 228a to 628a and 828a indicated by bold lines in FIGS. 16 (b) to 16 (f) and FIG. 17 (b). According to this configuration, the inclination of the stepped portion can be adjusted regardless of the axial length of the stepped portion.
  • Step portions 228a and 828a in FIGS. 16B and 17B are step portions in which the edge portion extending linearly or curvedly from the highest position increases in height toward the central portion in the axial direction of the fan.
  • the slope is gentler than that of 128e (that is, the amount of change in height in the axial range of a predetermined length is small). According to this configuration, it is possible to suppress the direction of the air flow sucked into the fan 10 from changing toward the edges of the step portions 228a and 828a.
  • the “axial range of a predetermined length” is, for example, a range of a length less than the axial length of the step portions 228a, 828a from the highest position of the step portions 228a, 828a, 128e.
  • the inclination angle of the edge portion extending linearly or curvedly from the highest position has a height toward the central portion in the axial direction of the fan. Is the same as the inclination angle of the stepped portion (second stepped portion) 128e, and the length of the edge portion is shorter than the edge portion extending linearly from the highest position of the stepped portion 128e. According to this configuration, it is possible to suppress a change in direction of the air flow sucked into the fan 10 so as to be directed to the vicinity of the edge portions of the step portions 328a to 628a.
  • the “axial range of a predetermined length” is, for example, a range having a length longer than the axial length of the edge portions of the step portions 328a to 628a from the highest position of the step portions 328a to 628a and 128e.
  • the height of the stepped portions 28a and 28b is the same as that of the stepped portions (second stepped portions) 28d and 28e.
  • the height of the highest position may be lower than the step portion (second step portion) 128e.
  • the two step portions 28a and 28b have the same height change amount ⁇ H1 in the axial range of the predetermined length W, but the change amounts may be different. In this case, from the viewpoint of suppressing turbulence in the vortex airflow, it is preferable that the amount of change of the stepped portion 28a far from the axial center portion M of the fan 10 is smaller than that of the stepped portion 28b.
  • the step portions 28 a to 28 c whose height decreases toward the axial center portion M of the fan 10
  • only the step portions 28 a and 28 b are high toward the axial center portion M of the fan 10.
  • the amount of change in the height in the axial range of a predetermined length is smaller than the stepped portions 28d and 28e where the height is increased.
  • all of the three stepped portions 28a to 28c are more affected than the stepped portions 28d and 28e. The amount may be small.
  • stepped portions 28a and 28b may have a smaller amount of change than the stepped portions 28d and 28e, and the other may have the same amount of change as the stepped portions 28d and 28e.
  • the amount of change of the stepped portion 28a far from the axial center portion M of the fan 10 is smaller than that of the stepped portion 28b.
  • the number of the step portions 28a to 28e provided in the rear guider 20 is the same as the number of the support plates 13, and the step portions 28a to 28e are arranged to face the support plate 13. It is not limited to. The number of step portions may be greater or less than the number of support plates 13. Further, the stepped portion does not have to be disposed to face the support plate 13.
  • the stepped portions 28a to 28e are constituted by the twisted portion 23.
  • the height of the tip of the twisted portion 23 continuously changes in the axial direction.
  • FIG. 18 and FIG. As in the rear guider 920 shown in FIG. 19, the heights of the portions between the step portions 928a to 928e and 929a to 929e may be constant in the axial direction. In this case, the rear guider 920 is easily formed.
  • the protrusion 922 of the rear guider 920 has a circular cross section perpendicular to the axial direction, and has a shape in which a high portion and a low portion are alternately arranged in the axial direction. ing. That is, at the tip of the rear guider 920, there are stepped portions 928a to 928e whose height decreases toward one end in the axial direction of the fan 10, and stepped portions 929a to 929e whose height increases toward one end in the axial direction of the fan 10. Are arranged alternately in the axial direction.
  • stepped portions (first stepped portions) 928a to 928c and 929c to 929e whose height decreases toward the central portion M in the axial direction of the fan 10
  • four stepped portions 928a and 928b that are close to both axial ends of the fan 10 929d and 929e are higher in the axial range of a predetermined length than the stepped portions (second stepped portions) 928d, 928e, 929a, and 929b whose height increases toward the central portion M in the axial direction of the fan 10.
  • the amount of change is small.
  • the “axial range of the predetermined length” is, for example, a range having a length shorter than the axial length of the step portions 928a, 928b, 929d, and 929e from the highest position of the step portions 928a to 928e and 929a to 929e.
  • a bulging portion 927 is formed in the vicinity of the step portions 928a, 928b, 929d, and 929e on the surface of the protruding portion 922 opposite to the fan 10.
  • the bulging portion 927 has a bulging height that decreases toward the axially central portion M of the fan 10.
  • the shape of the bulging portion 27 is not limited to the shape of the above-described embodiment, and may be any shape that bulges to the opposite side of the fan 10 from the periphery of the bulging portion 27.
  • the two bulging portions 27 have the same bulging height, but may be different. In this case, from the viewpoint of suppressing the turbulence of the vortex airflow, it is preferable that the bulging height of the bulging portion 27 far from the axial center portion M of the fan 10 is higher than the other bulging portion 27.
  • the bulging portion 27 is provided in the vicinity of both the step portions 28a and 28b, but the bulging portion 27 may be provided only in the vicinity of one of the step portions 28a and 28b. That is, one of the two inclination relaxing portions 25 may not have the surface opposite to the fan 10 bulging out from the twisted portion 23 and the connecting portion 24.
  • the stepped portion provided with the bulging portion 27 is preferably a stepped portion 28 a far from the axial center portion M of the fan 10.
  • the stepped portions 28a and 28b in the vicinity of the bulging portion 27 are inclined more than the stepped portions (second stepped portions) 28d and 28e whose height increases toward the axial center portion M of the fan 10.
  • the bulging portions 1027, 1127, 1227 The amount of change in the adjacent stepped portions 1028a, 1128a, and 1228a may be the same as the stepped portion (second stepped portion) 128e that increases in height toward the axial center portion M of the fan 10.
  • the range of the bulging parts 1027, 1127, and 1227 is displayed by hatching.
  • the formation range of the bulging part 27 is not limited to this.
  • the bulging part should just be formed in the vicinity of the level
  • the airflow flowing into the bent portion of the vortex airflow can be reduced.
  • the plurality of step portions provided at the tip of the stabilizer 32 have the same inclination, but the inclination of the plurality of step portions of the stabilizer 32 may be different from each other, like the rear guider 20 ( That is, the amount of change in height in the axial range of a predetermined length may be different. Specifically, the amount of change of at least one of the plurality of stepped portions whose height decreases toward the axial central portion M of the fan 10 is increased in the axial direction toward the axial central portion M of the fan 10. The height is made smaller than the stepped portion. Further, only one of the rear guider 20 and the stabilizer 32 may be different in inclination of the plurality of step portions.
  • the bulging portion is not provided in the vicinity of the stepped portion provided at the tip of the stabilizer 32, but the bulging portion is provided in the vicinity of the stepped portion of the stabilizer 32 as in the rear guider 20. It may be provided. Specifically, a bulging portion that bulges to the opposite side of the fan 10 from the surroundings is provided in the vicinity of at least one step portion whose height decreases toward the central portion M in the axial direction of the fan 10. Further, only one of the rear guider 20 and the stabilizer 32 may have a bulging portion.
  • the present invention is applied to the wall-mounted indoor unit configured to suck indoor air from the upper part of the indoor unit and blow out air from the lower part. It is not limited.
  • the present invention can be applied to a floor-standing indoor unit configured to suck indoor air from the lower part of the indoor unit and blow out air from the upper part.
  • the turbulence of the vortex air current can be suppressed and the wind noise can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
PCT/JP2013/072148 2012-09-28 2013-08-20 Climatiseur Ceased WO2014050365A1 (fr)

Priority Applications (3)

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EP13841557.5A EP2902632B1 (fr) 2012-09-28 2013-08-20 Climatiseur
CN201380050381.8A CN104662303B (zh) 2012-09-28 2013-08-20 空调机
ES13841557.5T ES2622007T3 (es) 2012-09-28 2013-08-20 Acondicionador de aire

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JP2012-215536 2012-09-28
JP2012215536A JP5477441B2 (ja) 2012-09-28 2012-09-28 空気調和機

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CN108194386A (zh) * 2018-02-07 2018-06-22 广东纽恩泰新能源科技发展有限公司 一种贯流式风机
JP7620838B2 (ja) * 2019-06-17 2025-01-24 パナソニックＩｐマネジメント株式会社 空気調和機
KR102784232B1 (ko) * 2019-11-22 2025-03-21 삼성전자주식회사 공기조화기
KR102800261B1 (ko) * 2020-02-25 2025-04-23 엘지전자 주식회사 공기조화기
JP7103465B1 (ja) 2021-03-31 2022-07-20 株式会社富士通ゼネラル 送風機および室内機

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EP2902632A1 (fr) 2015-08-05
CN104662303A (zh) 2015-05-27
CN104662303B (zh) 2016-06-22
JP5477441B2 (ja) 2014-04-23
JP2014070519A (ja) 2014-04-21
EP2902632A4 (fr) 2015-10-07
ES2622007T3 (es) 2017-07-05
EP2902632B1 (fr) 2017-01-11

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