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WO2021117440A1 - Dispositif de soufflage d'air - Google Patents

Dispositif de soufflage d'air Download PDF

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Publication number
WO2021117440A1
WO2021117440A1 PCT/JP2020/042982 JP2020042982W WO2021117440A1 WO 2021117440 A1 WO2021117440 A1 WO 2021117440A1 JP 2020042982 W JP2020042982 W JP 2020042982W WO 2021117440 A1 WO2021117440 A1 WO 2021117440A1
Authority
WO
WIPO (PCT)
Prior art keywords
main hole
air
hole
angle
airflow
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/JP2020/042982
Other languages
English (en)
Japanese (ja)
Inventor
潤 山岡
侑児 岡村
雅晴 酒井
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.)
Denso Corp
Original Assignee
Denso Corp
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 Denso Corp filed Critical Denso Corp
Priority to CN202080085490.3A priority Critical patent/CN114786975B/zh
Publication of WO2021117440A1 publication Critical patent/WO2021117440A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/34—Nozzles; Air-diffusers
    • 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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser

Definitions

  • This disclosure relates to an air blowing device.
  • the present inventors examined the mainstream blown out from the main hole and the airflow blown out from the auxiliary hole in order to further increase the reach of the working airflow. According to this study, if the part that defines the blowing angle of the support airflow is inclined from the upstream side to the downstream side of the airflow toward the center line of the main hole, the support airflow is near the center of the working airflow. It was found that the reach of the working airflow is shortened due to the turbulence of the working airflow when flowing toward it.
  • auxiliary hole is provided around the main hole does not show anything about the findings of the present inventors, and the reachability of the working airflow is further improved. It is difficult to anticipate. It is an object of the present disclosure to provide an air blowing device capable of improving the reachability of the working airflow blown from the main hole.
  • the air blower is In addition to forming the main flow path through which the air flow passes, a duct portion is provided at a portion of the main flow path located on the downstream side to open a main hole for blowing out the air flow that becomes the working air flow.
  • a duct portion is provided at a portion of the main flow path located on the downstream side to open a main hole for blowing out the air flow that becomes the working air flow.
  • At least one auxiliary hole for blowing out a support airflow that suppresses the drawing of air by the operating airflow is provided.
  • at least one of the angle defining portions that determine the blowing angle of the support airflow blown out from the auxiliary hole is inclined in a direction away from the center line of the main hole from the upstream side to the downstream side of the air flow.
  • the support airflow collides with the lateral vortex generated around the operating airflow downstream of the main hole, and the lateral vortex is generated.
  • the action of drawing in air is suppressed.
  • the angle-determining part since the angle-determining part has a structure that is inclined in a direction away from the center line of the main hole, it becomes difficult for the support airflow blown out from the auxiliary hole to approach the vicinity of the center of the working airflow blown out from the main hole, and the support airflow This suppresses turbulence near the center of the working airflow. As a result, the reachability of the working airflow blown out from the main hole can be sufficiently improved.
  • FIG. 3 is a sectional view taken along line IV-IV of FIG.
  • FIG. 3 is a sectional view taken along line VV of FIG. It is explanatory drawing for demonstrating the flow
  • the air blowing device 50 is connected to the indoor air conditioning unit 1 that air-conditions the vehicle via a duct 30.
  • the indoor air conditioning unit 1 is arranged inside the instrument panel located at the front of the vehicle interior.
  • the indoor air conditioning unit 1 has a case 2 that forms an outer shell. Inside the case 2, an air passage for blowing air toward the vehicle interior is configured.
  • An inside / outside air box 5 having an inside air introduction port 3 and an outside air introduction port 4 is arranged at the most upstream portion of the air passage of the case 2.
  • An inside / outside air door 6 is rotatably arranged in the inside / outside air box 5.
  • the inside / outside air door 6 switches between an inside air mode in which the vehicle interior air is introduced from the inside air introduction port 3 and an outside air mode in which the vehicle interior outside air is introduced from the outside air introduction port 4.
  • the inside / outside air door 6 is driven by a servomotor (not shown).
  • An electric blower 8 that generates an air flow toward the vehicle interior is arranged on the downstream side of the inner / outer air box 5.
  • the blower 8 has a centrifugal blower fan 8a and a motor 8b for driving the blower fan 8a.
  • An evaporator 9 for cooling the air flowing in the case 2 is arranged on the downstream side of the blower 8.
  • the evaporator 9 is a cooling heat exchanger that cools the blown air of the blower 8.
  • the evaporator 9 is one of the elements constituting the well-known vapor compression refrigeration cycle.
  • a heater core 15 for heating the air flowing in the case 2 is arranged on the downstream side of the evaporator 9.
  • the heater core 15 is a heat exchanger for heating that uses hot water of a vehicle engine as a heat source to heat cold air after passing through the evaporator 9.
  • a bypass passage 16 is formed on the side of the heater core 15, and the bypass air of the heater core 15 flows through the bypass passage 16.
  • An air mix door 17 is rotatably arranged between the evaporator 9 and the heater core 15.
  • the air mix door 17 is driven by a servomotor (not shown), and its opening degree can be continuously adjusted.
  • the ratio of the amount of hot air passing through the heater core 15 to the amount of cold air passing through the bypass passage 16 and bypassing the heater core 15 is adjusted by the opening degree of the air mix door 17. As a result, the temperature of the air blown into the vehicle interior is adjusted.
  • the defroster door 22, the face door 23, and the foot door 24 are rotatably arranged upstream of these outlets 19 to 21. These doors 22 to 24 are opened and closed by a common servomotor via a link mechanism (not shown).
  • instrument panels have been required to be thinner in the vertical direction of the vehicle from the viewpoint of expansion of the vehicle interior and design. Further, the instrument panel tends to be equipped with a large-sized information device for notifying various information indicating the driving state of the vehicle in the central portion in the vehicle width direction or the portion facing the occupant in the vehicle front-rear direction.
  • the horizontal vortex is a vortex whose center is orthogonal to the flow direction of the air flow.
  • an air blowing device 50 for improving the reach of the airflow is connected to the face outlet 20 provided in the case 2 via the duct 30.
  • the air whose temperature has been adjusted by the indoor air conditioning unit 1 is blown into the vehicle interior from the air blowing device 50 through the duct 30 from the case 2.
  • the air blowing device 50 has a duct portion 51 and a flange portion 52.
  • the duct portion 51 and the flange portion 52 are made of resin.
  • the indoor air conditioning unit 1 shown in FIG. 1 is connected to the duct portion 51.
  • the duct portion 51 shown in FIGS. 3 and 4 is formed with a main flow path 510 through which the airflow passes.
  • the duct portion 51 has a tubular shape having an oval cross section.
  • the duct portion 51 has an introduction hole 511 for introducing air conditioning air into the main flow path 510 at a portion located on the upstream side of the air flow.
  • the duct portion 51 is formed with a main hole 512 that blows out an air flow that becomes an operating air flow at a portion located on the downstream side of the air flow in the main flow path 510.
  • the opening direction of the main hole 512 is set so that the working airflow is blown into the vehicle interior.
  • the opening direction is the normal direction of the surface including the edge forming the main hole 512.
  • the duct portion 51 has a double-cylinder structure having an outer cylinder 51A and an inner cylinder 51B on the downstream side of the air flow.
  • the outer cylinder 51A forms the outer shell of the duct portion 51.
  • the inner cylinder 51B is arranged inside the outer cylinder 51A with a slight gap through which the air flow can pass with respect to the outer cylinder 51A.
  • the inner cylinder 51B is shorter than the outer cylinder 51A in the axial direction.
  • the duct portion 51 has a main flow path 510 formed inside the inner cylinder 51B and inside a portion of the outer cylinder 51A that does not lap in the radial direction with the inner cylinder 51B. Further, the duct portion 51 is formed with an auxiliary flow path 513 through which the air flow passes between the outer cylinder 51A and the inner cylinder 51B.
  • the auxiliary flow path 513 is a branch flow path that branches from the main flow path 510, and a part of the air flow that flows through the main flow path 510 flows into the auxiliary flow path 513.
  • the outer cylinder 51A and the inner cylinder 51B are connected to each other by a cylinder connecting portion 514 located on the downstream side of the air flow of the main flow path 510 and the auxiliary flow path 513. As shown in FIGS. 3 and 4, the cylinder connecting portion 514 forms an end face on the downstream side of the air flow in the duct portion 51.
  • the cylinder connecting portion 514 has a ring shape, and the opening inside the cylinder connecting portion 514 constitutes the main hole 512.
  • the opening shape of the main hole 512 is a flat shape. Specifically, the opening shape of the main hole 512 is an oval shape.
  • a pair of long edge portions 514a and 514b facing each other at a predetermined interval and a pair of short edge portions 514c and 514d connecting the pair of long edge portions 514a and 514b to each other. Is formed.
  • the pair of short edge portions 514c and 514d are opposed to each other at a larger distance than the pair of long edge portions 514a and 514b.
  • the pair of long edge portions 514a and 514b extend linearly so as to be parallel to each other.
  • the pair of short edge portions 514c and 514d are curved in an arc shape so as to protrude in a direction away from the center of the main hole 512.
  • the pair of long edge portions 514a and 514b extend linearly, their curvatures are substantially zero. Further, since the pair of short edge portions 514c and 514d are curved in an arc shape, the curvature is larger than that of the pair of long edge portions 514a and 514b.
  • the pair of short edge portions 514c and 514d form the first curvature portion where the curvature in the direction along the peripheral edge of the main hole 512 is a predetermined value
  • the pair of long edge portions 514a and 514b form the first curvature portion. It constitutes a second curvature portion having a smaller curvature than.
  • the predetermined value is a value set to the reciprocal of the radius of curvature of the pair of short edge portions 514c and 514d.
  • the longitudinal direction of the opening of the main hole 512 is referred to as the width direction DRw
  • the lateral direction of the opening of the main hole 512 is referred to as the height direction DRh.
  • the size in the height direction DRh of the main flow path 510 is referred to as the flow path height
  • the size in the width direction DRw of the main flow path 510 is referred to as the flow path width.
  • the longitudinal direction of the opening of the main hole 512 is the direction in which the pair of long edge portions 514a and 514b in the main hole 512 extend.
  • the lateral direction of the opening of the main hole 512 is a direction orthogonal to the opening direction of the main hole 512 and the pair of long edge portions 514a and 514b, respectively.
  • the inner wall surface connected to the main hole 512 constitutes the blowing inner wall surface 512d that determines the blowing angle of the working airflow blown out from the main hole 512.
  • the blowing inner wall surface 512d extends from the downstream end of the inner cylinder 51B of the duct portion 51 toward the upstream of the air flow. More specifically, the blowout inner wall surface 512d is set in a range from the upstream end to the downstream end of the downstream flat portion 518, which will be described later.
  • the blowout inner wall surface 512d extends along the center line CL of the main hole 512 so that the angle formed by the center line CL of the main hole is substantially zero. As a result, the working airflow is blown out from the main hole 512 along the center line CL of the main hole 512.
  • the working airflow blown out from the main hole 512 tends to diffuse to the surroundings due to the action of drawing in the air of the working airflow.
  • the air drawing action is caused by the lateral vortex Vt generated by the shearing force due to the velocity gradient of the working airflow when the working airflow is blown out from the main hole 512.
  • the lateral vortex Vt generated around the working airflow expands from the inside to the outside of the main hole 512 in the vortex layer center VCL.
  • the vortex layer center VCL of the lateral vortex Vt tends to be tilted by a predetermined angle ⁇ with respect to the center line CL of the main hole 512.
  • This predetermined angle ⁇ is, for example, about 1.94 [deg].
  • a plurality of auxiliary holes 515 for blowing out a support airflow that suppresses the action of drawing in air by the airflow are formed around the main hole 512 in the duct portion 51.
  • the auxiliary hole 515 is formed in the cylinder connecting portion 514 located on the downstream side of the air flow of the auxiliary flow path 513. The airflow passing through the auxiliary flow path 513 is blown out from the auxiliary hole 515 as a support airflow.
  • the plurality of auxiliary holes 515 are formed with respect to the cylinder connecting portion 514 so as to be arranged in a ring shape.
  • the auxiliary hole 515 is formed evenly over the entire circumference of the cylinder connecting portion 514 so that a part of the auxiliary hole 515 is not biased in the circumferential direction of the cylinder connecting portion 514.
  • a part of the auxiliary hole 515 is indicated by a reference numeral.
  • the inner wall surface connected to the auxiliary hole 515 constitutes an angle defining portion 516 that determines the blowing angle of the working airflow blown out from the main hole 512.
  • the angle defining portion 516 is composed of an inner wall surface extending from the downstream end of the outer cylinder 51A and the inner cylinder 51B of the duct portion 51 toward the upstream of the air flow.
  • the angle defining portion 516 is set in the range from the upstream end to the downstream end of the downstream flat portion 518, which will be described later.
  • a plurality of angle defining portions 516 are provided corresponding to the auxiliary holes 515. That is, the duct portion 51 is provided with the same number of angle defining portions 516 as the auxiliary holes 515.
  • the support airflow blown from the auxiliary hole 515 intersects the vortex layer center VCL of the lateral vortex Vt downstream of the outlet of the main hole 512, so that the main hole 512 is formed.
  • the development of the lateral vortex Vt generated downstream of the outlet is suppressed.
  • the air blowing device 50 of the present embodiment is set so that the blowing angle of the support airflow blown from the auxiliary hole 515 is away from the center line CL of the main hole 512.
  • the plurality of angle defining portions 516 of the present embodiment are inclined in a direction away from the center line CL of the main hole 512 from the upstream side to the downstream side of the air flow.
  • the inner wall surface of the auxiliary flow path 513 connected to the auxiliary hole 515 is expanded in a trumpet shape.
  • the inner wall surface of the auxiliary flow path 513 connected to the auxiliary hole 515 is a facing surface facing each other in the inner cylinder 51B and the outer cylinder 51A.
  • the plurality of angle defining portions 516 are set with an inclination angle ⁇ with respect to the center line CL of the main hole 512 so that the support airflow flows along the vortex layer center VCL of the lateral vortex Vt.
  • Each of the plurality of angle defining portions 516 is set to the same inclination angle ⁇ .
  • the inclination angles ⁇ of the plurality of angle defining portions 516 are set within the range shown by the following mathematical formula F1, for example. 0 ⁇ ⁇ 2 ⁇ ⁇ ... (F1)
  • the blowing inner wall surface 512d of the present embodiment extends along the center line CL of the main hole 512 so that the angle formed by the center line CL of the main hole 512 is substantially zero. Therefore, the angle defining portion 516 of the present embodiment has an inclination angle ⁇ larger than the angle formed by the blowing inner wall surface 512d and the center line CL of the main hole 512 with respect to the center line CL of the main hole 512. Is tilted.
  • the height of the duct portion 51 is changed from the upstream side to the downstream side of the air flow. That is, as shown in FIG. 4, the duct portion 51 has an upstream flat portion 517, a downstream flat portion 518, and a throttle portion 519.
  • the upstream flat portion 517 and the downstream flat portion 518 are portions inside the duct portion 51 in which the height of the flow path is maintained at a constant size.
  • the throttle portion 519 is a portion where the flow path height of the main flow path 510 is reduced from the upstream side to the downstream side of the air flow.
  • the throttle portion 519 is set between the upstream side flat portion 517 and the downstream side flat portion 518.
  • the throttle portion 519 is set at a position closer to the main hole 512 than the introduction hole 511 in the main flow path 510 so that a contraction occurs in the vicinity of the main hole 512.
  • the throttle portion 519 has a curved curved shape so that a portion connected to the upstream flat portion 517 and a portion connected to the downstream flat portion 518 are rounded.
  • a flange portion 52 is provided on the upstream flat portion 517.
  • the flange portion 52 is a member for attaching the duct portion 51 to an instrument panel (not shown).
  • the flange portion 52 is composed of a rectangular member provided so as to protrude from the duct portion 51 with respect to the outer circumference of the duct portion 51.
  • the flange portion 52 is attached to the instrument panel by a connecting member such as a screw in a state where the portion on the upstream side of the duct portion 51 is fitted to the air outlet of the air conditioning unit.
  • the flange portion 52 is formed with through holes 520 for passing connecting members such as screws near the four corners forming the corners.
  • the air introduced into the duct portion 51 is blown out from the main hole 512 after passing through the main flow path 510.
  • the air blowing device 50 of the present embodiment is provided with a throttle portion 519 for reducing the flow path height of the main flow path 510 with respect to the duct portion 51. Therefore, the wind speed distribution of the working airflow in the lateral direction (that is, the height direction DRh) of the opening of the main hole 512 is made uniform as compared with the configuration in which the throttle portion 519 is not provided for the duct portion 51. ..
  • the lateral vortex Vt generated around the working airflow is likely to be generated at a position away from the center line CL of the main hole 512. That is, the lateral vortex Vt generated by the velocity difference with the stationary fluid on the outside of the duct portion 51 is likely to be generated at a position away from the center line CL of the main flow path 510. Therefore, when the working airflow is blown out, the diffusion of the working airflow in the lateral direction and the longitudinal direction of the opening of the main hole 512 is suppressed.
  • the air blowing device 50 blows out the support airflow from the auxiliary hole 515.
  • This support airflow intersects the vortex layer center VCL of the lateral vortex Vt downstream of the outlet of the main hole 512. Therefore, the lateral vortex Vt is likely to collapse due to the support airflow. That is, the development of the lateral vortex Vt generated downstream of the outlet of the main hole 512 is suppressed.
  • the inclination angle ⁇ with respect to the center line CL of the main hole 512 is set so that the support airflow flows along the vortex layer center VCL of the lateral vortex Vt in the plurality of angle defining portions 516. Therefore, the support airflow blown out from the auxiliary hole 515 becomes difficult to approach the vicinity of the center of the working airflow blown out from the main hole 512. As a result, the turbulence near the center of the working airflow is suppressed by the supporting airflow, so that the reachability of the working airflow blown out from the main hole 512 can be sufficiently improved.
  • the support airflow flows in the range indicated by the hatching of the dot pattern in FIGS. 6 and 7, for example.
  • the air blowing device 50 described above has a structure in which a support airflow is blown from an auxiliary hole 515 provided around the main hole 512.
  • the duct portion 51 is provided with a plurality of auxiliary holes 515 around the main hole 512. According to this, the support airflow collides with the lateral vortex Vt generated around the operating airflow downstream of the main hole 512, and the lateral vortex Vt is disturbed, so that the air drawing action is suppressed.
  • the air blowing device 50 has a structure in which the angle defining portion 516 is inclined in a direction away from the center line CL of the main hole 512. Therefore, it becomes difficult for the support airflow blown out from the auxiliary hole 515 to approach the vicinity of the center of the working airflow blown out from the main hole 512, and the turbulence near the center of the working airflow is suppressed by the supporting airflow. As a result, the reachability of the working airflow blown out from the main hole 512 can be sufficiently improved.
  • the plurality of angle defining portions 516 are mainly arranged so that the inclination angle ⁇ of the main hole 512 with respect to the center line CL is larger than the angle formed by the blowing inner wall surface 512d and the center line CL of the main hole 512. It is inclined with respect to the center line CL of the hole 512. According to this, since it becomes difficult for the support airflow blown out from the auxiliary hole 515 and the mainstream of the working airflow blown out from the main hole 512 to intersect, the turbulence near the center of the working airflow due to the supporting airflow is sufficiently suppressed.
  • the blowout inner wall surface 512d extends along the center line CL of the main hole 512, but the present invention is not limited to this, and for example, from the upstream side to the downstream side of the air flow. It may be inclined in a direction away from the center line CL of the main hole 512. In this case, it is desirable that the inclination angle ⁇ of the angle defining portion 516 is set to be equal to or larger than the angle formed by the blowing inner wall surface 512d and the center line CL of the main hole 512.
  • the inclination angle ⁇ of the angle defining portion 516 is the center of the blowout inner wall surface 512d and the main hole 512 with respect to the angle ⁇ formed by the center line CL of the main hole 512 and the vortex layer center VCL of the lateral vortex Vt. It is desirable to set the angle so that the angle formed by the line CL is added.
  • the inclination angle ⁇ of the angle defining portion 516 is mainly the blowout inner wall surface 512d. It may be set to be less than the angle formed by the center line CL of the hole 512.
  • each of the plurality of angle defining portions 516 is inclined from the upstream side to the downstream side of the air flow in a direction away from the center line CL of the main hole 512, but the air blowing device is illustrated. 50 is not limited to this. In the air blowing device 50, for example, a part of the plurality of angle defining portions 516 may be inclined in a direction away from the center line CL of the main hole 512, and the other may extend along the center line CL of the main hole 512.
  • the lateral vortex Vt generated around the working airflow is generated by the shearing force due to the velocity gradient of the working airflow. As shown in FIG. 8, this velocity gradient tends to occur inward of the main hole 512 in the vicinity of the exit of the main hole 512. That is, the vortex center of the lateral vortex Vt generated around the working airflow is located substantially at the center of the thickness of the velocity boundary layer BP of the working airflow, and tends to occur inside the portion forming the main hole 512. This was found by the investigation of the present inventors.
  • the duct portion 51 of the present embodiment is located inside the duct portion 51 so that at least a part of the portion forming the auxiliary hole 515 forms the main hole 512. It is positioned. That is, in the duct portion 51, a part of the main hole 512 and a part of the auxiliary hole 515 overlap each other in the circumferential direction centered on the center line CL of the main hole 512.
  • the inner portion of the cylinder connecting portion 514 forming the edge portion of the main hole 512 has a wavy meandering curve.
  • the plurality of auxiliary holes 515 are formed in a portion protruding inward at the edge portion of the main hole 512.
  • a velocity boundary layer BP of the working airflow is formed downstream of the outlet of the main hole 512, as shown in FIG.
  • a lateral vortex Vt is generated near the central portion of the thickness.
  • a part of the air conditioning air whose temperature is adjusted by the indoor air conditioning unit 1 is blown out from the auxiliary hole 515 as a support air flow through the auxiliary flow path 513.
  • the support airflow blown out from the auxiliary hole 515 is blown out from a position close to the central portion of the velocity boundary layer BP of the working airflow blown out from the main hole 512. According to this, since the support airflow flows near the vortex center of the lateral vortex Vt generated in the velocity boundary layer BP, the lateral vortex Vt is likely to collapse due to the support airflow.
  • the air blowing device 50 of the present embodiment can obtain the same action and effect as those of the first embodiment from the same configuration or the equivalent configuration as that of the first embodiment.
  • the air blowing device 50 at least a part of the portion forming the auxiliary hole 515 is positioned inside the duct portion 51 with respect to the portion forming the main hole 512. According to this, the lateral vortex Vt can be disturbed by the support airflow, and the lateral vortex Vt becomes difficult to develop. Therefore, the drawing of air from the surroundings into the working airflow blown out from the main hole 512 is suppressed and the attenuation of the flow velocity of the working airflow is reduced, so that the reach of the working airflow blown out from the main hole 512 can be lengthened. it can.
  • the duct portion 51 may have a structure in which a part of the main hole 512 and the entire auxiliary hole 515 overlap each other in the circumferential direction centered on the center line CL of the main hole 512, for example.
  • the main hole 512 is surrounded by a pair of linear long edge portions 514a and 514b and a pair of short edge portions 514c and 514d having a curvature larger than that of the pair of long edge portions 514a and 514b. It has been.
  • the pair of short edge portions 514c and 514d having a large curvature around the main hole 512 has a larger shape change than the pair of long edge portions 514a and 514b having a small curvature, so that the shape change causes disturbance.
  • the development speed of the lateral vortex Vt tends to increase due to the turbulence.
  • the lateral vortex Vt tends to spread to a position away from the working air flow as compared with the pair of long edge portions 514a and 514b. This was found by the investigation of the present inventors.
  • a part of the angle defining portion 516 of the plurality of angle defining portions 516 is set to an inclination angle ⁇ different from that of the other angle defining portion 516.
  • the inclination angle ⁇ 2 of the angle defining portion 516 of the auxiliary hole 515 provided in the short edge portions 514c and 514d is provided in the long edge portions 514a and 514b. It is larger than the inclination angle ⁇ 1 of the angle defining portion 516 of the hole 515.
  • the inclination angle ⁇ 2 of the angle defining portion 516 corresponding to the pair of short edge portions 514c and 514d is set to an angle ⁇ 2 larger than the above-mentioned angle ⁇ 1 as shown in FIG.
  • the angle ⁇ 2 is a parameter determined by experiments and simulations, and is an angle ⁇ formed by the vortex layer center VCL of the lateral vortex Vt generated downstream of the pair of short edge portions 514c and 514d and the center line CL of the main hole 512. Is set assuming.
  • the inclination angles ⁇ 1 and ⁇ 2 of the angle defining portion 516 are set within the range shown by the following mathematical formulas F2 and F3, for example. 0 ⁇ 1 ⁇ 2 ⁇ ⁇ 1... (F2) ⁇ 1 ⁇ 2 ⁇ 2 ⁇ ⁇ 2... (F3)
  • the blowing inner wall surface 512d of the present embodiment is along the center line CL of the main hole 512 so that the angle formed by the center line CL of the main hole 512 is substantially zero, as in the first embodiment. It is extending. Therefore, the angle defining portion 516 of the present embodiment has the center line CL of the main hole 512 so that the inclination angles ⁇ 1 and ⁇ 2 are larger than the angle formed by the blowout inner wall surface 512d and the center line CL of the main hole 512. It is inclined with respect to.
  • the air blowing device 50 of the present embodiment can obtain the same action and effect as those of the first embodiment from the same configuration or the equivalent configuration as that of the first embodiment.
  • the development rate of the lateral vortex Vt is increased due to the large shape change as compared with the portion having a small curvature, and the lateral vortex Vt is developed laterally. It was found that the vortex Vt tends to spread to a position away from the working airflow.
  • the inclination angle ⁇ 2 of the angle defining portion 516 provided on the pair of short edge portions 514c and 514d having a large curvature has a pair of long edge portions 514a and 514b having a small curvature. It is larger than the inclination angle of the angle defining portion 516 provided in.
  • the blowout inner wall surface 512d extends along the center line CL of the main hole 512, but the present invention is not limited to this, and for example, the main hole It may be inclined in a direction away from the center line CL of 512. In this case, it is desirable that the inclination angles ⁇ 1 and ⁇ 2 of the angle defining portion 516 be set to be equal to or larger than the angle formed by the blowing inner wall surface 512d and the center line CL of the main hole 512.
  • the inclination angles ⁇ 1 and ⁇ 2 of the angle defining portion 516 are the angles formed by the blowing inner wall surface 512d and the center line CL of the main hole 512. It may be set to less than.
  • each of the plurality of angle defining portions 516 is inclined from the upstream side to the downstream side of the air flow in a direction away from the center line CL of the main hole 512, but the air blowing device is illustrated. 50 is not limited to this.
  • the angle defining portions 516 of the pair of short edge portions 514c and 514d are inclined in a direction away from the center line CL of the main hole 512, and the angle defining portions 516 of the pair of long edge portions 514a and 514b are formed. It may extend along the center line CL of the main hole 512.
  • the opening shape of the main hole 512 is an oval shape formed by connecting an arc and a straight line, but the present invention is not limited to this.
  • the main hole 512 is, for example, an elliptical shape having a rectangular shape, an arc shape having a large arc of curvature and an arc having a small radius of curvature connected, a polygonal shape such as a hexagon connecting straight lines, and a rectangular shape having rounded corners. It may have a shape such as. Further, the shape of the pair of long edge portions 514a, 514b and the pair of short edge portions 514c, 514d constituting the main hole 512 is not limited to a straight line or an arc, and the shape is such that irregularities are formed in the straight line or the arc. You may be. Further, the main hole 512 is not limited to a flat shape, and may have a non-flat shape such as a circular shape or a square shape.
  • a plurality of auxiliary holes 515 are formed around the main hole 512, but the duct portion 51 is not limited to this.
  • the duct portion 51 may be formed with at least one auxiliary hole 515.
  • a fine round hole is exemplified as the auxiliary hole 515, but the hole shape of the auxiliary hole 515 is not limited to this.
  • the hole shape of the auxiliary hole 515 may be, for example, an oval shape, a polygonal shape, or the like.
  • the duct portion 51 provided with the upstream flat portion 517, the downstream flat portion 518, and the throttle portion 519 is illustrated, but the present invention is not limited thereto.
  • the duct portion 51 for example, any of the upstream side flat portion 517, the downstream side flat portion 518, and the throttle portion 519 may be omitted.
  • the one to which the air blowing device 50 of the present disclosure is applied to the air outlet of the indoor air conditioning unit 1 is illustrated, but the application target of the air blowing device 50 is not limited to this.
  • the air blowing device 50 of the present disclosure can be widely applied not only to a moving body such as a vehicle but also to an air blowing outlet of an installation type air conditioning unit for home use or the like.
  • the air blowing device 50 of the present disclosure is not limited to an air conditioning unit that air-conditions a room, and for example, a temperature control that blows out temperature-controlled air that adjusts the temperature of an air outlet of a humidifying device that humidifies the room, a heating element, or the like. It can also be applied to the air outlet of equipment.
  • the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle.
  • the air blowing device includes a duct portion through which a main hole for blowing an air flow as an operating air flow is opened.
  • a main hole for blowing an air flow as an operating air flow is opened.
  • at least one auxiliary hole for blowing out a support airflow that suppresses the drawing of air by the operating airflow is provided.
  • at least one of the angle defining portions that determine the blowing angle of the support airflow blown out from the auxiliary hole is inclined in a direction away from the center line of the main hole from the upstream side to the downstream side of the air flow.
  • At least one of the angle defining portions of the main hole is such that the inclination angle with respect to the center line of the main hole is equal to or larger than the angle formed by the inner wall surface connected to the main hole and the center line of the main hole. It is inclined with respect to the center line. According to this, since it becomes difficult for the support airflow blown out from the auxiliary hole and the mainstream of the working airflow blown out from the main hole to intersect, the turbulence near the center of the working airflow due to the support airflow is sufficiently suppressed.
  • the duct portion is located inside the duct portion with respect to the portion where at least a part of the portion forming the auxiliary hole forms the main hole.
  • the vortex center of the transverse vortex generated around the working airflow is located approximately at the center of the thickness of the velocity boundary layer of the working airflow, and tends to occur inside the portion forming the main hole. I found out. Therefore, if at least a part of the portion forming the auxiliary hole is positioned inside the duct portion with respect to the portion forming the main hole, the lateral vortex can be disturbed by the support airflow. As a result, the lateral vortex is less likely to develop, so that the reachability of the working airflow blown out from the main hole can be sufficiently improved.
  • the duct portion is provided with a plurality of auxiliary holes around the main hole. According to this, the support airflow tends to collide with the lateral vortex generated around the working airflow downstream of the main hole, and the lateral vortex tends to be disturbed downstream of the main hole, so that the air drawing action can be sufficiently suppressed. it can.
  • the duct portion is provided with a plurality of angle defining portions corresponding to the auxiliary holes.
  • the plurality of angle defining portions are inclined in a direction away from the center line of the main hole from the upstream side to the downstream side of the air flow.
  • some of the angle-determining parts among the plurality of angle-determining parts have different inclination angles with respect to the center line of the main hole from the other angle-determining parts.
  • the actual developmental characteristics of the transverse vortex are not uniform but diverse around the working airflow. Therefore, if the inclination angle with respect to the center line of the main hole is different from that of some angle-determining parts and other angle-determining parts, even if the lateral vortex has various developmental characteristics, the lateral vortex is affected by the support airflow. Can be disturbed to suppress the action of drawing in air.
  • the first curvature portion where the curvature in the direction along the peripheral edge of the main hole is a predetermined value and the second curvature portion having a smaller curvature than the first curvature portion.
  • the part corresponding to the auxiliary hole provided in the first curvature part has an inclination angle with respect to the center line of the main hole as compared with the part corresponding to the auxiliary hole provided in the second curvature part. It's getting bigger.
  • the development speed of the lateral vortex is increased due to the large shape change as compared with the portion having a small curvature, and the lateral vortex is generated from the working airflow. It was found that it tends to spread to distant positions. Therefore, if the inclination angle of the angle-defined part of the portion having a large curvature is larger than the inclination angle of the angle-defined portion of the portion having a small curvature, the lateral vortex develops in the portion having a large curvature and the portion having a small curvature. Can be effectively suppressed to suppress the action of drawing in air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Duct Arrangements (AREA)

Abstract

L'invention concerne un dispositif de soufflage d'air (50) qui est pourvu d'une section de conduit (51) dans laquelle : un trajet d'écoulement principal (510) à travers lequel passe un flux d'air est formé; et un trou principal (512) pour souffler un flux d'air servant de flux d'air de travail s'ouvre au niveau d'un site situé sur le côté aval dans le trajet d'écoulement principal. Au moins un trou auxiliaire (515) pour souffler un flux d'air d'assistance qui arrête l'aspiration d'air par l'écoulement d'air de travail est disposé sur la périphérie du trou principal dans la section de conduit. Dans la section de conduit, au moins un site de régulation d'angle (516) établissant un angle de soufflage du flux d'air d'assistance qui est soufflé à partir du trou auxiliaire est incliné dans la direction s'éloignant de la ligne centrale du trou principal à partir du côté amont de l'écoulement d'air vers le côté aval.
PCT/JP2020/042982 2019-12-13 2020-11-18 Dispositif de soufflage d'air Ceased WO2021117440A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202080085490.3A CN114786975B (zh) 2019-12-13 2020-11-18 空气吹出装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019225324A JP7259727B2 (ja) 2019-12-13 2019-12-13 空気吹出装置
JP2019-225324 2019-12-13

Publications (1)

Publication Number Publication Date
WO2021117440A1 true WO2021117440A1 (fr) 2021-06-17

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JP (1) JP7259727B2 (fr)
CN (1) CN114786975B (fr)
WO (1) WO2021117440A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59119128A (ja) * 1982-12-25 1984-07-10 Nippon Denso Co Ltd 空調装置の吹出口構造
JPS60110522A (ja) * 1983-11-18 1985-06-17 Nippon Denso Co Ltd 空気調和装置の吹出口
DE102012215686A1 (de) * 2012-09-04 2014-03-06 Behr Gmbh & Co. Kg Luftausströmer
WO2019198571A1 (fr) * 2018-04-11 2019-10-17 株式会社デンソー Dispositif d'évacuation d'air

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4430649B2 (ja) * 2006-10-20 2010-03-10 三星電子株式会社 空気調和装置の室内ユニット
JP6318931B2 (ja) * 2014-07-14 2018-05-09 株式会社デンソー 空気吹出装置
JP2018119542A (ja) * 2017-01-26 2018-08-02 株式会社デンソー エジェクタ
CN207963085U (zh) * 2018-01-31 2018-10-12 广东美的制冷设备有限公司 空调器的导风板、壳体组件及空调器
CN109442586B (zh) * 2018-11-30 2021-03-19 广东美的制冷设备有限公司 出风装置和空气处理装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59119128A (ja) * 1982-12-25 1984-07-10 Nippon Denso Co Ltd 空調装置の吹出口構造
JPS60110522A (ja) * 1983-11-18 1985-06-17 Nippon Denso Co Ltd 空気調和装置の吹出口
DE102012215686A1 (de) * 2012-09-04 2014-03-06 Behr Gmbh & Co. Kg Luftausströmer
WO2019198571A1 (fr) * 2018-04-11 2019-10-17 株式会社デンソー Dispositif d'évacuation d'air

Also Published As

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JP2021094874A (ja) 2021-06-24
CN114786975B (zh) 2024-10-18
JP7259727B2 (ja) 2023-04-18
CN114786975A (zh) 2022-07-22

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